PMA KS 50 User manual

Industrial controllers
Industrieregler
Régulateurs industriels
KS 40, KS 50, KS90
Interface description
Schnittstellenbeschreibung
Description de linterface
9499 040 47701
valid from/gültig ab/valable depuis: 8315

ENGLISH Page 1 DEUTSCH Seite 9 FRANÇAIS Page
1 Notes on operation . .. . . . . . . . . . . . . 1 1 Hinweisezum Betrieb . . . . . . . . . . . . 9 1 . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . .
2 Interface protocol. . .. . . . . . . . . . . . . 2 2 Schnittstellenprotokoll . . . . . . . . . . 10 2 . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .
2.1 Data format . . . . . . . . . . . . . . . . . . . . . 2 2.1 Datenformat . . .. . . . . . . . . . . . . . . . 10 2.1 . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .
2.2 Baudrate .. . .. . . . . . . . . . . . . . . . . . . 2 2.2 Baudrate . . . . . . . . . . . . . . . . . . . . . . 10 2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Address setting. . . . . . . . . . . . . . . . . . . 2 2.3 Adressierung. . . . . . . . . . . . . . . . . . . 10 2.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Characters . . . . . . . . . . . . . . . . . . . . . . 2 2.4 Zeichen . . . . . . . . . . . . . . . . . . . . . . . 10 2.4 . . . . . .. . .. . . . .. . . . . .. . . . . .. . . . . .
3 Message structure. . .. . . . .. . . . . .. . 3 3 Nachrichtenaufbau . . . . . . . . . . . . . 11 3 . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .
3.1 General structure . . . . . . . . . . . . . . .. . 3 3.1 Grundsätzlicher Aufbau . . . . . . . . . . 11 3.1 . . . . . . . . . . . . . .. . . . . .. . . . . .. . . . . .
3.2 Messages ACK and NAK . . . . . . . . . . . 3 3.2 Nachrichten ACK und NAK. . . . . . . 11 3.2 . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Reaction times . . . . . . . . . . . . . . . . . . . 3 3.3 Reaktionszeiten.. . . . . . . . . . . . . . . . 11 3.3 . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .
4 CODEtable . .. . . . . .. . . . .. . . . . .. . 4 4 CODE - Tabelle . . .. . . . . . . . . . . . . 12 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Structure of status bytes . . . . . . . . . . . 6 5 Aufbau der Statusbytes . . . . . . . . . . 14 5 . . . . . .. . . . . .. . . . . . . .. . . . . .. . . . . .
6 Communication examples. . . . . . . . . . 6 6 Kommunikationsbeispiele . . . . . . . . 14 6 . . . . . . . . . . . . . .. . . . . .. . .. . . . . . . . .
7 REMOTE/LOCAL operation . . . . . . . 7 7 REMOTE/LOCAL-Betrieb . . . . . . . 15 7 . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .
8 Whatto do, if....? . . . . . . . . . . . . . .. . 7 8 Was tun? Wenn... . . . . . . . . . . . . .. . 15 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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A publication of Dies ist eine Publikation von Une publication de
PMA Prozeß- und Maschinen-Automation GmbH
P.O.Box 310 320
D-34113 Kassel
Germany

1English
Interface description
1 Notes on operation
The controller can be equipped with aserial digital interface for transmission of process values,
parameters and configuration data. The interface connections are on the rear of the controller, the
hardware is TTL compatible. Several instruments can be connected with separate cables to interface
modules and several interface modules can be operated by means of a bus. Via their RS 422/485
interface, data communication upto 1 km distance with master PLCs, PCs, visualization tools etc. is
possible (read and write). In remote mode of the controller, these tools can affect controller data (write)
by means of relevant programs. In this operation mode, modification of controller data by means of the
front keys is not possible.
The available protocol is based on ISO 1745.
In the controller, the internal digital interface is galvanically isolated from supply voltage and input and
signal circuits.
In the interface module, the instrument interfaces and the bus interface are interconnected but
galvanically isolated from the supply voltage.
The operating notes of the interface modules include further information for connection and operation.
Connecting examples for interface modules and masters
KS 40 / KS 50 / KS 90 Interface module Master
Controller plug Bus plug RS 422 e.g. IQT 150
Master
RS 485 e.g. interface converter M-4
1
2
3
4
5
6
7
8
9
5
4
3
2
1
9
8
7
6
max. 1000m
GND
TXD-A
TXD-B
RXD-A
RXD-B
GND
TXD-B
TXD-A
RXD-B
RXD-A
1
2
3
4
5
6
7
8
9
16
15
14
13
12
RXD
TXD
TRE
GND
5V+
1
2
3
4
5
6
7
8
9
max. 1000m
1
2
3
4
5
DATA-B
DATA-A
RGND
DATA-B
DATA-A
RGND
English Notes on operation
960612 1 Interface description 9499 040 47701

2 Interface protocol
The protocol is based on ISO 1745. Generally, a fixed master/slave principle is used for transmission,
whereby the controller is always the slave. Control is always by the master.
Two data transmission services are available:
qSend Data with Acknowledge SDA (Data transmission with acknowledgement by the controller)
qRequest Data with Reply RDR (Data request with reply by the controller)
2.1 Data format
w1 start bit w1 parity bit (EVEN)
w7 bit binary (status byte) or
7 bit ASCII (other data) w1 stop bit
2.2 Baud rate
The Baud rate of 2400/4800/9600/19200 Bd is adjustable at the configuration level.
The same Baud rate must be adjusted on all instruments which are connected to the interface module.
2.3 Adress setting
The controller can be operated at the same bus with other instruments and systems. Decisive for
instrument selection is the address Adr = 00... 99 (parameter level).
2.4 Characters
Transmission control characters Valid 7-bit-characters (parity EVEN):
CHR HEX Description CHR HEX Description
STX 02 Start of data , 2C Comma as separation
ETX 03 End of data = 3D Separation for CODE = VAL
EOT 04 Reset or cancellation . 2E Decimal point (only for VAL)
ENQ 05 Enquiry of reply - 2D Minus (only for VAL)
ACK 06 Acknowledge 0...9 30...39 Numbers 0...9
NAK 15 Not Acknowledge @... 40...7F Values of the status bytes
+The characters for "space"and "+" (hex 20, 2B) are inadmissible in all messages.
Interface protocol English
Interface description 9499 040 47701 2 960612

3 Message structure
Generally, single data are transmitted, exceptions are shown in the
CODE-table (Ächapter 4). Values in a reply are transmitted without
leading zeros, but minus sign/decimal point depending on the date.
Values in a transmission are valid within their limits with or without
decimal point. They will be cut and rounded to the required data
structure. Some parameters can be switched off by means of four minus
signs.
ADR Address (2 bytes)
CODE Code for data
VAL Value of data
DATA Comprises CODE = VAL
BCC Block Check Count Ü
CHR Character
FCT Function *
ÜAll characters after STX and including ETX are connected bytewisely in an EXOR function (1 byte).
*Function is the second part of the B2-codes. For B2,01 it is 01 and for B2,02 it is 02.
3.1 General structure
qComputer requests: EOT ADR ADR CODE CODE ENQ
With blocks B2, CODE and FCT must be requested: CODE CODE , FCT FCT
General reply: STX CODE CODE = tVAL rETX BCC or NAK in case of error
Block 00 reply: STX ST1 , ST2 , Y , W , X , Wv , Wnv , , HC/X2 ETX BCC
Blocks B2 reply: CODE is B2. FCT is first part of VAL.
VAL (Block B2,01): 0 1 , 1 0 , SP2 , SP3 , SP4 , SP5 , SP6 , SP7 , SP8 , SP9 , SP10 , SP11 , 0
VAL (Block B2,02): 0 2 , 0 , 1 0 , Pt2 , Pt3 , Pt4 , Pt5 , Pt6 , Pt7 , Pt8 , Pt9 , Pt10 , Pt11
qComputer transmits: EOT ADR ADR STX CODE CODE = tVAL rETX BCC
With blocks B2, CODE and FCT must be transmitted: CODE CODE , FCT FCT FCT is repeated in VAL.
VAL (Block B2,01): 0 1 , 1 0 , SP2 , SP3 , SP4 , SP5 , SP6 , SP7 , SP8 , SP9 , SP10 , SP11 , 0
VAL (Block B2,02): 0 2 , 0 , 1 0 , Pt2 , Pt3 , Pt4 , Pt5 , Pt6 , Pt7 , Pt8 , Pt9 , Pt10 , Pt11
General reply: ACK or NAK in case of error
3.2 Messages ACK (write access) and NAK (write or read access)
The controller replies ACK to a write access, if all the following conditions are met:
wParity bit correct wValue is within its specified limits
wBCC correct wController is at REMOTE mode
wCODE permittted and positioned correctly wPermitted write access (e.g. Code 06)
wMessage contains only permitted characters wMessage (data) received correctly
If one of the above conditions is not met, the controller replies NAK.
With message receive buffer overflow, the controller replies NAK.
With read access, remote or localoperation does not affect the message.
3.3 Reaction times
The computer enquires for data (read access) The computer sends data (write access)
wThe reply starts (STX) max. 150 ms after the
end of enquiry (ENQ). wThe reply (ACK) starts max. 150 ms after the end of transmission (BCC).
English Message structure
960612 3 Interface description 9499 040 47701

4 CODE table
The table shows the CODEs for data transmission. Two data types are permitted:
qFor the two status bytes: 1 Byte, bit-oriented
qFor all other data: Decimal digits, with decimal point and/or minus sign, each ASCII-coded
Explanation of columns:
Disp: Messages displayed by the controller (symbols in brackets are not displayed)
R: Read data from controller (Local/Remote)
W: Write data to controller (Remote)
Len: max. number of bytes between STX and ETX (DATA)
KS KS KS
CODE Description 40 50 90 Disp R/W Len. Value range Rem.
q00 Operating level fff R 40/46 Ü
01 Status byte 1 fff (ST1) R 4
02 Status byte 2 fff (ST2) R 4
03 Correcting variable fff (Y) YR/(W) 7 *
04 Setpoint effective fff (W) R 9
05 Process value fff (X) R 9 Ö
06 Setpoint volatile fff (Wvol) R/W 9 SPL... SPH/- - - - ä#>
07 Setpoint non-volatile fff (Wnonvol) R/W 9 SPL... SPH/- - - - ä#>
09 Heating current ff -HC R7
09 2nd process value - - f(X2) R 9
11 Controller active / not active - - f- R/W 4 0 / 1
12 Y2 active / not active - - f- R/W 4 0 / 1
13 Manual mode active / not active - - f- R/W 4 0 / 1
14 2nd set-point active / not active - - f- R/W 4 0 / 1
15 Wext active / not active - - f- R/W 4 0 / 1
19 Ydiff - - f- W 7 -205...205
21 Proportional band heating fff Pb1 R/W 8 0.1...999.9
22 Proportional band cooling fff Pb2 R/W 8 0.1...999.9
23 Integral time fff ti R/W 7 0/1...9999
24 Derivative time fff td R/W 7 0...9999
25 Actuator response time f-ftt R/W 6 (tt) <
26 Alarm switching differential (1) fff Sd(A1)R/W 9 1...9999
27 Trigger point separation f-fSH R/W 7 0.2...20.0%
28 Alarm switching differential (2) - - fSdA2 R/W 9 1...9999
29 Zero offset (ratio control) - - fOFFS R/W 6 -20...0...20
31 Limit contact low (1) fff LCL(1)R/W 9 1/ InL...9999/- - - - >
32 Limit contact high (1) fff LCH(1)R/W 9 1/ InL...9999/- - - - >
35 Limit contact low (2) - ff LCL(2)R/W 9 1/ InL...9999/- - - - >
36 Limit contact high (2) - ff LCH(2)R/W 9 1/ InL...9999/- - - - >
39 Signaller switching differential - - fSdS R/W 9 1...9999
47 Heating current limit ff -HCA R/W 7 (HCA)/- - - - <>
48 Heating current range - f-HCH R/W 7 1.0...99.9
48 Min. step time - - fttP R/W 6 0.1...2.0
CODE table English
Interface description 9499 040 47701 4 960612

KS KS KS
CODE Description 40 50 90 Disp R/W Len. Value range Rem.
51 2nd set-point or fff SP2 R/W 9 SPL... SPH/- - - - #>
52 Set-points for programmer fff SP3 R/W 9 SPL... SPH
53 fff SP4 R/W 9 SPL... SPH
54
Segment times for programmer
fff Pt2 R/W 7 0...9999
55 fff Pt3 R/W 7 0...9999
56 fff Pt4 R/W 7 0...9999
57 5th set-point (programmer) fff SP5 R/W 9 SPL... SPH
58 5th segment time (progr.) fff Pt5 R/W 7 0...9999
59 Gradient fff Gr R/W 8 0.1...999.9 /- - - - >
q61
Configuration level
fff Con1 R7
q
62 fff Con2 R7
q63 -ff Con3 R7
q
64 --
f
Con4 R7
71 Correcting variable for start-up - ff YA R/W 6 5...100
72 Set-point for start-up - ff SPA R/W 9 SPL... SPH
73 Holding time for start-up - ff PtA R/W 7 0...9999
74 Max. correct. variable average - f-YH R/W 6 5...100
75 Limit for averaging (corr. var.) - f-LYH R/W 7 0.1...10.0
76 2nd correcting variable - - fY2 R/W 6 YLL... YLH
77 Filter time constant - - ftF R/W 8 0.0...999.9
78 Span start fff InL R/W 9 999...( InH - 1) y
79 Span end fff InH R/W 9 ( InL + 1)...9999 y
81 Decimal point fff dP R/W 4 (dP) <
82 Lower set-point limit fff SPL R/W 9 InL...( SPH - 1)
83 Upper set-point limit fff SPH R/W 9 ( SPL+ 1)... InH
85 Lower output limit - - fYLL R/W 7 -100...( YLH - 10)
86 Upper output limit - - fYLH R/W 7 ( YLL + 10)...100
87 Cycle time heating fff t1 R/W 8 0,4...999,9
88 Cycle time cooling fff t2 R/W 8 0,4...999,9
89 Operation locking fff Loc R/W 4 (Loc) <
B2,01 Set-points SP2... SP11 --
fR/W 80/83 SPL... SPH Ü
B2,02 Segment times Pt2... Pt11 --
fR/W 60/63 0...9999 Ü
ÜBlock access (Ächapter 3.1, General structure and chapter 6, Communication examples)
*KS 40 / KS 50: (Y) can be read only.
KS 90: Ycan be read and written. The written value becomes valid in manual mode.
ÖThe process value is only valid, if bit 3 and bit 5 in status byte 1 are 0 (no sensor or polarity error).
äÄchapter 7, Remote/Local operation
#With KS 40 / KS 50 positioners: output signal (–100%) / 0%...100%, no switch-off function.
<The limits of these values depend on the instrument (Ädata sheet or operating instructions).
>If four minus signs are transmitted, the relevant function is switched off.
yThese values can be written only with standard signal input. They must not be changed with running
programmer or ramp (ÄNAK).
English CODE table
960612 5 Interface description 9499 040 47701

5 Structure of status bytes
Status byte 1 (CODE 01) Status byte 2 (CODE 02)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
KS 40 PA 1 PL 0 FB A1 KL HZ KS 40 PA 1 0 HC PG 0 0 LR
KS 50 PA 1 PLA2FBA1KLHZKS 50 PA 1 0 HC PG 0 0 LR
KS 90 PA 1 PLA2FBA1KLHZKS 90 PA 1 F2 Y2 PG WE AH LR
Description 0 1 Description 0 1
HZ Heating on off LR Control mode local remote
KL Cooling on off AH Operation mode automatic manual
A1 LC1-Alarm off on WE Set-point eff. extern intern
FB Sensor condition correct break/short circ. PG Progr./ramp inactive active
A2 LC2-Alarm off on HC Heat.curr. alarm off on
PL Sensor polarity correct wrong Y2 Output var. Y2 inactive active
Bit6 fix value always logic 1 F2 Sensor 2 cond. correct break/short circ.
PA Parity EVEN Bit6 fixed value always logic 1
PA Parity EVEN
Permissible characters hex dez Permissible characters hex dez
KS 40 1000000...1101111 40...6F 64...111 @...o KS 40 1000000...1011001 40...59 64...89 @...Y
KS 50 1000000...1111111 40...7F 64...127 @... KS 50 1000000...1011001 40...59 64...89 @...Y
KS 90 1000000...1111111 40...7F 64...127 @... KS 90 1000000...1111111 40...7F 64...127 @...
6 Communication examples
Thestructure of communication strings for B2-codes is shown in chapter 3.1.
qExample 1: The computer requests Pb2 (CODE 22) from controller with address 00.
Request EOT 0 0 2 2 ENQ
ADR CODE
Controller replies STX 2 2 = 1 2 . 0 ETX BCC Pb2 = 12.0 [%]
CODE VAL
qExample 2: The computer sets Pb1 (CODE 21) = 399.9 [%] of controler with address 01.
Transmission EOT01STX21=399. 9ETXBCC
ADR CODE VAL
Controller replies ACK or NAK in case of error
qExample 3: The computer requests the operating block (CODE 00) of controller with address 23.
Request EOT 2 3 0 0 ENQ
ADR CODE
Controller replies STX@, E, 4 .5, 4.7, , 1000ETXBCC
01 02 03 ... 07 09
The reply comprises the values of Codes 01...09, each separated by a comma. Exceptions: The missing
Code 08 is replaced by a comma without value, and there is no comma after the value of Code 09.
The values of Codes 01 and 02 are coded bit by bit, the values of the other Codes are ASCII-coded.
Structure of status bytes English
Interface description 9499 040 47701 6 960612

7 REMOTE/LOCAL operation
The controller can be switched to REMOTE or LOCAL operation.
Switch-over by Terminals Condition for REMOTE
qKS 40 Link 10 / 11 link fitted
qKS 50 Active signal 11 (+) / 10 (-) signal 24 V
qKS 90 Active signal 9 (+) / 10 (-) or 11 (+) / 10 (-) signal 24 V; input selection with Con4
Switchover is always possible. Any simultaneously running data transmission by the computer is
cancelled and the already received data are lost. Any simultaneously running data transmission by the
controller is not affected.
In LOCAL mode, only reading is possible, write attempts are rejected with NAK. Additionally, the
display and changing of parameters and configurations is possible via the controller keys.
In REMOTE mode, all operations of the serial interface (writing and reading) are permitted.
Additionally, the display of parameters and configurations is possible via the controller keys, but
changes can be made only via the interface.
Volatile and non-volatile setpoint
In REMOTE mode, a volatile setpoint (Wvol, CODE 06) and a non-volatile setpoint (Wnonvol,
CODE 07) can be transmitted to the controller. The effective setpoint is Wvol. A transmitted Wnonvol
is without effect on the control, however, the previous internal setpoint of the controller is overwritten.
If Wvol is ----, all outputs are switched off in remote mode; if Wnonvol is ----, all outputs are
switched off in local mode.
When switching over to LOCAL mode, Wvol is lost. In this case, the previous internal setpoint
(possibly overwritten by Wnonvol) of the controller is the effective setpoint. If Wnonvol has been set to
----in remote mode, all outputs are switched off in local mode.
8 What to do, if...?
gThe controller does not react in the following cases:
wWrong PC interface used (COM1; COM2; Baud rate)
wAddress is not valid
wMessage is not complete
wInterface cable wrong or defective
wFaulty setting or defect of interface converter
wInterface module not energized
wInterface module defective
wController not energized
wController defective
gThe pin identifications TXD-A, TXD-B, RXD-A and RXD-B for RS 422 or DATA-A and DATA-B for
RS 485, are sometimes used in some interface hardware with different meanings. If no communication
occurs though correctly cabled, possibly A and B must be interchanged (e.g. TXD-A to RXD-B and
TXD-B to RXD-A etc.)
English REMOTE/LOCAL operation
960612 7 Interface description 9499 040 47701

Notes
Interface description 9499 040 47701 8 960612