Honeywell UMC800 User manual

UMC800 Controller
RS232 Communications
Reference Manual
51-52-25-76B
8/99
ATTENTION
THE SOFTWARE WITH THIS MANUAL IS PROVIDED FREE OF CHARGE. IT IS TO
BE USED AS-IS, WITH NO LIABILITY OR SUPPORT FROM HONEYWELL.

ii RS232 Communications Reference Manual 8/99
Copyright, Notices, and Trademarks
Printed in U.S.A. – © Copyright 1999 by Honeywell Inc.
Revision B – 8/99
While this information is presented in good faith and believed to be
accurate, Honeywell disclaims the implied warranties of
merchantability and fitness for a particular purpose and makes no
express warranties except as may be stated in its written agreement
with and for its customer.
In no event is Honeywell liable to anyone for any indirect, special or
consequential damages. The information and specifications in this
document are subject to change without notice.
UMC800 Universal Multi-loop Controller is a trademark of Honeywell
Inc.
Honeywell
Industrial Automation and Control
Automation College
1100 Virginia Drive
Fort Washington, PA. 19034

8/99 RS232 Communications Reference Manual iii
About This Document
Abstract
This Reference Manual contains detailed information regarding RS232 Communications for the
UMC800 Controller. It provides a descriptive breakdown of the message formats in the data exchange
between a computer and the UMC800 controller. There is a Table of Contents listing the accessible
function blocks in alphabetical order. Each Function Block includes tables for the dynamic and static
parameters that can be accessed through RS232 Communications.
References
Honeywell Documents
The following list identifies all Honeywell documents that may be sources of reference for the material
discussed in this publication.
Document Title ID #
UMC800 Controller Technical Overview 51-52-03-24
UMC800 Controller Installation and User
Guide 51-52-25-61
UMC800 Operator Interface User Guide 51-52-25-62
UMC800 Control Builder User Guide 51-52-25-63
UMC800 Control Builder Function Block
Reference Guide 51-52-25-64

iv RS232 Communications Reference Manual 8/99
Contents
1. UMC800-RS232 COMMUNICATIONS...................................................................1
1.1 Overview.........................................................................................................................................1
2. RS232 PORT PROTOCOL DESCRIPTION...........................................................3
2.1 Overview.........................................................................................................................................3
2.2 Definition of Error Types ...............................................................................................................3
2.3 DLE Insertion and Deletion............................................................................................................3
2.4 CRC.................................................................................................................................................4
2.5 Sequence Numbering......................................................................................................................4
2.6 Response to Link and Physical Errors............................................................................................4
2.7 Reserved Addresses........................................................................................................................4
2.8 Static and Dynamic Parameters......................................................................................................4
2.9 Anatomy of a Message Packet........................................................................................................5
2.10 Message Exchange Examples.........................................................................................................6
2.10.1 Read Contiguous 32-bit Values..............................................................................................6
2.10.2 Read Scattered 32-bit Values .................................................................................................8
2.10.3 Write Scattered 32-bit Values ..............................................................................................10
2.11 Application Error Codes...............................................................................................................12
2.12 Sequence of Operations................................................................................................................13
3. PC COMMUNICATION DRIVER FOR RS232 PORT ..........................................15
3.1 Overview.......................................................................................................................................15
3.2 For the Programmer - Getting Started Quickly.............................................................................16
3.2.1 How Do I Use This Driver?...................................................................................................16
3.2.2 Code sample 1: instantiation of a driver object on the stack.................................................17
3.2.3 Code sample 2: dynamic instantiation of one of two driver objects on the heap..................18
3.2.4 Code sample 3: error handling...............................................................................................19
3.2.5 Multiple Instances of the Driver in the Same App................................................................20
3.2.6 Port Lockout..........................................................................................................................20
3.2.7 Managing Multiple Threads ..................................................................................................21
3.3 Taxonomy of Classes....................................................................................................................21
3.4 API Functions Common To All Drivers.......................................................................................21
3.5 Anatomy of a Standard Return Value...........................................................................................22
3.6 Frequently Asked Questions.........................................................................................................23
4. APPLICATION LAYER MESSAGE FORMATS...................................................27
4.1 Overview.......................................................................................................................................27

8/99 RS232 Communications Reference Manual v
4.2 Read Contiguous 32-Bit Values ...................................................................................................28
4.3 Read Scattered 32-Bit Values.......................................................................................................29
4.4 Write Scattered 32-Bit Values......................................................................................................30
4.5 Loopback.......................................................................................................................................31
4.6 Floating Point Format...................................................................................................................32
4.6.1 IEEE 754 Format...................................................................................................................32
4.6.2 Mantissa and Sign..................................................................................................................33
4.6.3 Exponent................................................................................................................................33
4.6.4 Mantissa and Exponent Combination....................................................................................34
4.6.5 Reserved Operands................................................................................................................34
5. FUNCTION PARAMETER INDEX REFERENCE ................................................35
5.1 Parameter Index Numbers.............................................................................................................35
5.2 ABS Function Block.....................................................................................................................38
5.3 ADD Function Block....................................................................................................................39
5.4 4ADD Function Block..................................................................................................................40
5.5 AI Function Block.........................................................................................................................41
5.6 ALM Function Block....................................................................................................................42
5.7 2AND Function Block..................................................................................................................43
5.8 4AND Function Block..................................................................................................................44
5.9 8AND Function Block..................................................................................................................45
5.10 AMB Function Block....................................................................................................................46
5.11 AO Function Block.......................................................................................................................48
5.12 ASYS Function Block...................................................................................................................49
5.13 BCD Function Block.....................................................................................................................51
5.14 BOOL Function Block..................................................................................................................52
5.15 CARB Function Block..................................................................................................................53
5.16 CMPR Function Block..................................................................................................................56
5.17 DCMP Function Block .................................................................................................................57
5.18 DEWP Function Block .................................................................................................................58
5.19 DI Function Block.........................................................................................................................59
5.20 DIV Function Block......................................................................................................................60
5.21 DO Function Block.......................................................................................................................61
5.22 DSW Function Block....................................................................................................................62
5.23 FGEN Function Block ..................................................................................................................63
5.24 FSS Function Block......................................................................................................................65
5.25 FSYS Function Block...................................................................................................................67
5.26 HLLM Function Block .................................................................................................................68
5.27 HMON Function Block.................................................................................................................69

vi RS232 Communications Reference Manual 8/99
5.28 HSEL Function Block...................................................................................................................70
5.29 LDLG Function Block..................................................................................................................71
5.30 LMON Function Block.................................................................................................................72
5.31 LSEL Function Block...................................................................................................................73
5.32 LTCH Function Block ..................................................................................................................74
5.33 MATH Function Block.................................................................................................................75
5.34 MDFL Function Block..................................................................................................................76
5.35 MMA Function Block...................................................................................................................77
5.36 MSF Function Block.....................................................................................................................78
5.37 MUL Function Block....................................................................................................................79
5.38 4MUL Function Block..................................................................................................................80
5.39 NEG Function Block.....................................................................................................................81
5.40 NOT Function Block ....................................................................................................................82
5.41 ONDT Function Block..................................................................................................................83
5.42 OFDT Function Block ..................................................................................................................84
5.43 ON/OFF Function Block...............................................................................................................85
5.44 2OR Function Block.....................................................................................................................87
5.45 4OR Function Block.....................................................................................................................88
5.46 8OR Function Block.....................................................................................................................89
5.47 PID Function Block......................................................................................................................90
5.48 PTMR Function Block..................................................................................................................93
5.49 RCP Function Block.....................................................................................................................94
5.50 RH Function Block.......................................................................................................................95
5.51 ROC Function Block.....................................................................................................................96
5.52 RSW Function Block....................................................................................................................97
5.53 RTMR Function Block .................................................................................................................98
5.54 SCB Function Block...................................................................................................................100
5.55 SPEV Function Block.................................................................................................................101
5.56 SPP Function Block....................................................................................................................103
5.57 SPS Function Block....................................................................................................................106
5.58 SPSA Function Block.................................................................................................................110
5.59 STFL Function Block .................................................................................................................112
5.60 STSW Function Block................................................................................................................113
5.61 SQRT Function Block ................................................................................................................114
5.62 SUB Function Block...................................................................................................................115
5.63 4SUB Function Block.................................................................................................................116
5.64 SW Function Block.....................................................................................................................117
5.65 TAHD Function Block................................................................................................................118

8/99 RS232 Communications Reference Manual vii
5.66 TGFF Function Block.................................................................................................................119
5.67 TOT Function Block...................................................................................................................120
5.68 TPO Function Block...................................................................................................................121
5.69 TPSC (3POS) Function Block....................................................................................................122
5.70 TRIG Function Block .................................................................................................................125
5.71 UPDN Function Block................................................................................................................126
5.72 VLIM Function Block.................................................................................................................127
5.73 WTUN Function Block...............................................................................................................128
5.74 WVAR Function Block ..............................................................................................................129
5.75 XFR Function Block...................................................................................................................130
5.76 XOR Function Block..................................................................................................................131
5.77 Variables.....................................................................................................................................132
6. BLOCK STATUS TYPES...................................................................................134
6.1 Overview.....................................................................................................................................134
6.2 Block Status Values and Definitions..........................................................................................134
APPENDIX A - CRC-16 CALCULATION.....................................................................136

viii RS232 Communications Reference Manual 8/99
Tables and Figures
Table 2-1 Application Error Codes______________________________________________________ 12
Table 5-1 Function Block Look-up Table_________________________________________________ 35
Table 5-2 ABS Dynamic Parameters____________________________________________________ 38
Table 5-3 ADD Dynamic Parameters ___________________________________________________ 39
Table 5-4 4ADD Dynamic Parameters __________________________________________________ 40
Table 5-5 AI Dynamic Parameters _____________________________________________________ 41
Table 5-6 AI Static Configuration Parameters ____________________________________________ 41
Table 5-7 ALM Dynamic Parameters ___________________________________________________ 42
Table 5-8 ALM Static Configuration Parameters __________________________________________ 42
Table 5-9 2AND Dynamic Parameters __________________________________________________ 43
Table 5-10 4AND Dynamic Parameters ________________________________________________ 44
Table 5-11 8AND Dynamic Parameters ________________________________________________ 45
Table 5-12 AMB Dynamic Values______________________________________________________ 46
Table 5-13 AMB Static Configuration Values_____________________________________________ 47
Table 5-14 AO Dynamic Parameters___________________________________________________ 48
Table 5-15 ASYS Dynamic Parameters_________________________________________________ 49
Table 5-16 BCD Dynamic Parameters__________________________________________________ 51
Table 5-17 BOOL Dynamic Parameters ________________________________________________ 52
Table 5-18 CARB Dynamic Parameters ________________________________________________ 53
Table 5-19 CARB Static Configuration Parameters _________________________________________ 54
Table 5-20 CMPR Dynamic Parameters ________________________________________________ 56
Table 5-21 DCMP Dynamic Parameters ________________________________________________ 57
Table 5-22 DCMP Static Configuration Parameters _______________________________________ 57
Table 5-23 DEWP Dynamic Parameters ________________________________________________ 58
Table 5-24 DEWP Static Configuration Parameters _______________________________________ 58
Table 5-25 DI Dynamic Parameters____________________________________________________ 59
Table 5-26 DIV Dynamic Parameters __________________________________________________ 60
Table 5-27 DO Dynamic Parameters___________________________________________________ 61
Table 5-28 DSW Dynamic Parameters _________________________________________________ 62
Table 5-29 FGEN Dynamic Parameters ________________________________________________ 63
Table 5-30 FGEN Static Configuration Parameters _______________________________________ 63
Table 5-31 FSS Dynamic Parameters____________________________________________________ 65
Table 5-32 FSYS Dynamic Parameters _________________________________________________ 67
Table 5-33 HLLM Dynamic Parameters ________________________________________________ 68
Table 5-34 HLLM Static Configuration Parameters _______________________________________ 68
Table 5-35 HMON Dynamic Parameters________________________________________________ 69
Table 5-36 HSEL Dynamic Parameters_________________________________________________ 70
Table 5-37 LDLG Dynamic Parameters ________________________________________________ 71
Table 5-38 LMON Dynamic Parameters________________________________________________ 72
Table 5-39 LSEL Dynamic Parameters _________________________________________________ 73
Table 5-40 LTCH Dynamic Parameters ________________________________________________ 74
Table 5-41 MATH Dynamic Parameters________________________________________________ 75
Table 5-42 MDFL Dynamic Parameters ________________________________________________ 76
Table 5-43 MMA Dynamic Parameters_________________________________________________ 77
Table 5-44 MSF Dynamic Parameters__________________________________________________ 78
Table 5-45 MSF Static Configuration Parameters_________________________________________ 78
Table 5-46 MUL Dynamic Parameters _________________________________________________ 79

8/99 RS232 Communications Reference Manual ix
Table 5-47 4MUL Dynamic Parameters ________________________________________________ 80
Table 5-48 NEG Dynamic Parameters__________________________________________________ 81
Table 5-49 NOT Dynamic Parameters__________________________________________________ 82
Table 5-50 ONDT Dynamic Parameters ________________________________________________ 83
Table 5-51 ONDT Static Parameters___________________________________________________ 83
Table 5-52 OFDT Dynamic Parameters ________________________________________________ 84
Table 5-53 ONDT Static Parameters___________________________________________________ 84
Table 5-54 ON/OFF Dynamic Parameters_______________________________________________ 85
Table 5-55 ON/OFF Static Configuration Parameters______________________________________ 86
Table 5-56 2OR Dynamic Parameters __________________________________________________ 87
Table 5-57 4OR Dynamic Parameters __________________________________________________ 88
Table 5-58 8OR Dynamic Parameters __________________________________________________ 89
Table 5-59 PID Dynamic Parameters___________________________________________________ 90
Table 5-60 PID Static Configuration Parameters _________________________________________ 91
Table 5-61 PTMR Dynamic Parameters ________________________________________________ 93
Table 5-62 RCP Dynamic Parameters __________________________________________________ 94
Table 5-63 RH Dynamic Parameters ___________________________________________________ 95
Table 5-64 ROC Dynamic Parameters __________________________________________________ 96
Table 5-65 ROC Static Configuration Parameters__________________________________________ 96
Table 5-66 RSW Dynamic Parameters _________________________________________________ 97
Table 5-67 RTMR Dynamic Parameters _________________________________________________ 98
Table 5-68 RTMR Static Configuration Parameters________________________________________ 99
Table 5-69 SCB Dynamic Parameters _________________________________________________ 100
Table 5-70 SPEV Dynamic Parameters________________________________________________ 101
Table 5-71 SPP Dynamic Contained Parameters_________________________________________ 103
Table 5-72 SPP Dynamic Output Parameters ___________________________________________ 104
Table 5-73 SPP Dynamic Input Parameters ______________________________________________ 105
Table 5-74 SPS Dynamic Contained Parameters__________________________________________ 106
Table 5-75 SPS Dynamic Output Parameters ____________________________________________ 108
Table 5-76 SPS Dynamic Input Parameters______________________________________________ 108
Table 5-77 SPS Static Configuration Parameters _________________________________________ 109
Table 5-78 SPSA Dynamic Parameters _________________________________________________ 110
Table 5-79 STFL Dynamic Values ____________________________________________________ 112
Table 5-80 STSW Dynamic Values____________________________________________________ 113
Table 5-81 SQRT Dynamic Parameters________________________________________________ 114
Table 5-82 SUB Dynamic Parameters_________________________________________________ 115
Table 5-83 4SUB Dynamic Parameters________________________________________________ 116
Table 5-84 SW Dynamic Parameters__________________________________________________ 117
Table 5-85 TAHD Dynamic Parameters _______________________________________________ 118
Table 5-86 TGFF Dynamic Parameters________________________________________________ 119
Table 5-87 TOT Dynamic Parameters_________________________________________________ 120
Table 5-88 TOT Static Configuration Parameters________________________________________ 120
Table 5-89 TPO Dynamic Parameters _________________________________________________ 121
Table 5-90 TPSC Dynamic Parameters ________________________________________________ 122
Table 5-91 TPSC Static Configuration Parameters _______________________________________ 123
Table 5-92 TRIG Dynamic Parameters ________________________________________________ 125
Table 5-93 UPDN Dynamic Parameters _______________________________________________ 126
Table 5-94 UPDN Static Configuration Parameters ______________________________________ 126
Table 5-95 VLIM Dynamic Parameters________________________________________________ 127
Table 5-96 VLIM Static Configuration Parameters________________________________________ 127

x RS232 Communications Reference Manual 8/99
Table 5-97 WTUN Dynamic Parameters ________________________________________________ 128
Table 5-98 WVAR Dynamic Parameters________________________________________________ 129
Table 5-99 XFR Dynamic Parameters __________________________________________________ 130
Table 5-100 XFR Static Configuration Parameters ________________________________________ 130
Table 5-101 XOR Dynamic Parameters_________________________________________________ 131
Table 5-102 Variables_______________________________________________________________ 132
Table 6-1 Block Status Values ________________________________________________________ 134
Figure 4-1 Read Contiguous 32-Bit Request and Response Message Formats____________________ 28
Figure 4-2 Read Scattered 32-Bit Request and Response Message Formats ____________________ 29
Figure 4-3 Write Scattered 32-Bit Request and Response Message Formats____________________ 30
Figure 4-4 Loopback Request and Response Message Formats______________________________ 31

Overview
8/99 RS232 Communications Reference Manual 1
1. UMC800-RS232 Communications
1.1 Overview
Purpose of this manual
This manual provides information about request and response messages used to exchange information
between a personal computer and a UMC800 Universal Multiloop Controller using the Leaderline Control
Builder RS232 communications port.
How the manual is structured
In the first section, a full RS232 Protocol description for message exchange is provided for those wishing to
write a driver in a specific programming language.
For those specifically using Microsoft Visual C++ on Windows 95 or NT, a driver code library is provided
on a separate diskette (supplied with the manual) allowing direct linkage to C++ programs without further
driver development. The PC Communications Driver section describes use of this library.
A “peek & poke” EXE utility file (with source code) is also provided on the diskette, which can be used to
experiment with UMC 800, RS232 communications to a Controller and can also serve as a guide in general
development using another language
Reader assumptions
We assume that you have had prior experience with programming and interpreting communications
protocols. Also, that you are familiar with UMC800 Controller Function Blocks and the LeaderLine Control
Builder Control Strategy Configuration concepts.
How to use this manual
Use this manual as a reference dictionary of UMC800 controller communications message formats for its
application programs. It is not intended as a comprehensible “how to” documents for initiating computer
communications with a UMC800 Controller.
In this manual
These major topics are covered in this manual.
Topic See Page
2 RS232 Port Protocol Description 3
3. PC Communications Driver 15
4. Application Layer Message Formats 27
5. Function Parameter Index Reference 35
6. Block Status Types 134
A. Appendix A - CRC-16 Calculation 136

Overview
2 RS232 Communications Reference Manual 8/99

Protocol Description
8/99 RS232 Communications Reference Manual 3
2. RS232 Port Protocol Description
2.1 Overview
This section of the manual describes the RS-232 “Configuration” port protocol for read/write access to
parameters in the UMC 800 Controller. It is intended for those not desiring to use the Microsoft Visual
C++ sample driver library provided and wish to use another programming language. The methods
described in the PC Communications Driver section along with the “peek & poke” utility file provided on
diskette may be used as a guide in driver development.
The protocol is loosely based on ANSI X3.28, utilizing asynchronous data transmission, DLE insertion for
data transparency prior to control characters, a two-byte CRC, and 32-bit 4-byte IEEE data formats. Data
Parameter access is via the function block number (1 through 249) and the index number of the parameter
within the block. Variables are addressed as block 250 with index numbers 0 through 149 (corresponding
to Variables 1 to 150).
The protocol allows for multiple parameter access in a read request message packet to increase data
throughput. This can be done by accessing a function block number and a contiguous range of parameter
indexes within that block or you may use a “scattered” message format to address multiple blocks and
indexes in any order. For the scattered message block method, up to 60 parameters may be read at once.
Writes are usually on a single block number, index basis but may also be on a multiple parameter basis
using the “scattered” message format (Maximum 40 or maximum packet size of 250 bytes). For instance,
this may apply to a range of Variables.
The link level data transmission format is to be fixed at 8 data bits, no parity, one stop bit and 9600 baud.
2.2 Definition of Error Types
Error Type Definition
Application The instrument rejected the message with an error code because the
request was invalid, bad sequence number, bad address.
Link Errors due to noise on the link, i.e. bad CRC.
Physical Errors which are trapped by the system or the hardware, i.e. timeout, bad
parity, bad framing.
2.3 DLE Insertion and Deletion
A DLE character will precede control characters. Any DLE that exists in the fields between the packet
header and footer will have an extra DLE inserted in front of it, which will be stripped out by the receiver,
similar to the zero insertion and deletion in HDLC protocol. On transmit, the CRC will be calculated before
DLE insertion is performed. On receive, DLE deletion will be performed before the CRC is checked.

Protocol Description
4 RS232 Communications Reference Manual 8/99
2.4 CRC
The 16 bit cyclic redundancy is computed using a CRC-16 algorithm (as opposed to the CCITT CRC
algorithm). It will be placed in the packet LSB first. The check will include everything between the packet
header and footer. It will not include any inserted DLE characters. This is because the DLE insertion must
protect the CRC in the event that CRC == DLE|STX or CRC == DLE|ETX.
For the CRC-16 Calculation, refer to Appendix A.
2.5 Sequence Numbering
The sequence number is a serial number that uniquely identifies a message. The host generates an arbitrary
sequence number when it sends a request to an instrument. The instrument echoes this number in its reply.
This is so that the host can verify that the instrument is replying to the correct message.
Imagine the following scenario: the host sends a message with sequence number 5 to the instrument.
However, due to a firmware update, it now takes the instrument 10 seconds to reply to this particular
message. After 3 seconds, the host times out. A few seconds later, the host sends a different message with
sequence number 6 to the instrument. By this time, the instrument has just finished processing message
number 5 and sends the reply. The host is able to detect the out-of-synch error because the request had
sequence number 6 but the reply had sequence number 5.
Note that it is not necessary for the sequence numbers to be in any sort of order. Therefore, for the sake of
efficiency, the host may optionally skip sequence number 16 to unburden the instrument from having to
DLE-strip the sequence number. This is not a feature of the protocol. The instrument should not assume
that it would never get a sequence number 16.
2.6 Response to Link and Physical Errors
The instrument will not respond to bad incoming messages in any way. It will be the host’s responsibility to
detect the timeout and retransmit the message. The host will respond to bad replies from the instrument by
retransmitting the message without incrementing the sequence number, as mentioned before.
2.7 Reserved Addresses
Unit address 1 is reserved for broadcast messages, which all of the instruments on the link will obey, but
none of the instruments will reply to. Unit address 255 is reserved for the host.
2.8 Static and Dynamic Parameters
There are two types of parameters that can be accessed:
STATIC – a static parameter is a configuration parameter
DYNAMIC – A dynamic parameter is an Input/Output parameter.
Each of these parameter types has a specific index number set.
Configuration parameters (Static) and I/O parameters (Dynamic) cannot be accessed in the same message
since both the Static parameters and the Dynamic parameters each start at Index Number 0.

Protocol Description
8/99 RS232 Communications Reference Manual 5
2.9 Anatomy of a Message Packet
Symbol key:
Symbol Value Meaning
DLE 0x01 Precedes control characters.
STX 0x02 Start of transmission.
ETX 0x03 End of transmission.
DADR 1
0xff
Destination address.
Controller
Host
SADR 1
0xff
Source address.
Controller
Host
SEQ n/a Sequence number.
CRC n/a Cyclic redundancy check.
ANAK 0x09 Application level negative acknowledge
AACK 0x0a Application level acknowledge.
ERRCODE n/a Error code explaining why instrument rejected message.
(See Subsection 2.11- Table 2-1)
Host to Instrument
DLE|STX|DADR|SADR|SEQ|...message*...|CRC|CRC|DLE|ETX
* Refer to Section 4 - Message Exchange Formats
Instrument to Host
(1) If message was good and the instrument understood the message
DLE|STX|DADR|SADR|SEQ|...message*...|CRC|CRC|DLE|ETX
* Refer to Section 4 - Message Exchange Formats
(2) If message was good but the instrument rejected the message (i.e. application level failure)
DLE|STX|DADR|SADR|SEQ|ANAK|ERRCODE (see table 2-1)|CRC|CRC|DLE|ETX
(3) If message was bad
Silence.

Protocol Description
6 RS232 Communications Reference Manual 8/99
2.10 Message Exchange Examples
2.10.1 Read Contiguous 32-bit Values
Below is an example of a Read Contiguous 32-bit Value message exchange.
Example
Read of PV, WSP (Working (or active) Set Point), Output, and Mode from the controller assuming the
function block number for the PID block is 2 (PID2) starting at Index #9.
References
See Subsection 2.9 and Subsection 4.21(Figure 4-1) for formats.
See Subsection 5.47 for PID block dynamic parameters and indices.
Request Message
Host to UMC 800 Controller
10 02 01 ff 01 00 02 04 00 02 02 09 7f 46 10 03
DLE
STX
Destination
Address
Source Address
Sequence Number
Read
ContiguousValues
# ofValues
Filler Byte
Dynamic Parameter
BlockNumber
Index Number
CRC
DLE
ETX

Protocol Description
8/99 RS232 Communications Reference Manual 7
2.10.1 Read Contiguous 32-bit Values, continued
Response Message
Controller to Host: (good message)
Assume values are PV=1002.4, WSP = 1000.0, output = 10.4, and mode = 4.0 (Local SP, Automatic)
10 02 ff 01 01 09 02 04 44 7a 99 9a 44 7a 00 0041 26 66 66 40 80 00 00bf 40 1003
DLE
STX
Destination
Address
Source Address
Acknowledge
# ofValues
PV= 1002.4
WSP =1000.0
Output = 10.4
Mode= 4.0(Local Setpoint,Auto Mode)
CRC
DLE
ETX
Floating Point IEEE Format
Contiguous32 bit values
Sequence Number
Mode is decoded as follows (also see Sect 2,48 of Manual 51-52-25-64):
0.0= RSP AUTO
1.0= RSP MAN
2.0= RSP Initialization Manual
3.0= RSP Local Override
4.0= LSP AUTO
5.0= LSP MAN
6.0= LSP Initialization Manual
7.0= LSP Local Override
Controller to Host (bad message, with a typical error code)
10|02|FF|01|0a|01|7e|80|10|03

Protocol Description
8 RS232 Communications Reference Manual 8/99
2.10.2 Read Scattered 32-bit Values
Below is an example of a Read Scattered 32-bit Value message exchange.
Example
Read of PV, WSP (Working Set Point), Output, and Mode from the controller assuming the function block
number for the PID block is 3 (PID3) plus Read the value of an Analog Input (assume block number is 2)
and its failed input status, six parameters total.
References
See Subsection 2.9 and Subsection 4.3 (Figure 1) for formats.
See Subsection 5.5 for Analog Input block and Subsection 5.45 for PID block dynamic parameter
references.
Request Message
Read message request from Host to UMC 800 (in hex):
10 02 01 ff 01 00 03 06 00 02 03 09 03 10 03 1103 1202 01 0202 3e81 10 03
DLE
STX
Destination
Address
Source Address
Sequence Number
Read
Scattered Values
# ofValues
Filler Byte
Dynamic Parameter
Block # 3
Index # 9
CRC
DLE
ETX
Block # 3
Inde x # 10
Block # 3
Inde x # 11
Block # 3
Inde x # 12
Block # 2
Index # 1
Block # 2
Index # 2
continued next page

Protocol Description
8/99 RS232 Communications Reference Manual 9
2.10.2 Read Scattered 32-bit Values, continued
Response Message
Controller to Host: (good message)
Assume values are PV=1002.4, WSP = 1000.0, Output = 10.4, Mode = 4.0 (Local SP, Automatic),
AI Input Value = 500, Failed Input = off.
DLE
STX
Destination
Address
Source Address
Sequence Number
Scattered 32 bit Values
Acknowledge
# of Values
PV = 1002.4
WSP = 1000.0
Output = 10.4
Mode = 4.0 (Local Setpoint, Auto Mode)
CRC
DLE
ETX
FloatingPoint IEEE Format
AI Input Value = 500
Failed Input = Off
Controller to Host (bad message, with a typical error code)
10|02|FF|01|0a|01|7e|80|10|03

Protocol Description
10 RS232 Communications Reference Manual 8/99
2.10.3 Write Scattered 32-bit Values
Below are examples of a Read Scattered 32-bit Value message exchange.
Example 1
Write a local Set Point of 1200.0 to a controller PID block, assuming block number is 3.
Request Message
10 02 01ff 01 0103 01 00 02 03 01 44 96 00 00bf40 10 03
DLE
STX
Destination
Address
Source Address
Sequence Number
Write
Scattered Values
# ofValues
Filler Byte
Dynamic Parameter
Block # 3
Index # 1
CRC
DLE
ETX
LSP= 1200.0
Response Message
Controller to Host: (good message)
DLE
STX
Destination
Address
Source Address
Sequence Number
Scattered 32 bit Values
Acknowledge
CRC
DLE
ETX
Controller to Host (bad message, with a typical error code)
10|02|FF|01|0a|01|7e|80|10|03