Philips Aleron Series 2-1 Operator's manual

I
SYSTEM 21
QUICK
OPERATING
GUIDE
4822 872 30319
860415
1. INTRODUCTION
I
The aim of this guide is to facilitate getting started with System 21. To explore the
full possibilities of System 21 it is necessary to consult the "System 21 manual",
which contains all the details.
System 21 consists of:
-one master function
-functional units
: performs System
21 control and the communication
(transparent) with functional units.
: perform auxilary tasks such as switching, scanning,
1/0 etc.
SYSTEM 21
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CONTROLLER I MASTER I
I FUNCT
IONA L UNITS (SLAVES)
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SYS TEM 21 BUS
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ST4701
PHILIPS

CONTENTS
1. INTRODUCTION
2. HOW TO INTERCONNECT THE UNITS
3. ADDRESS SELECTION
4. ADDRESSING A MESSAGE
5. COMMANDS
6. READING DATA FROM SYSTEM 21
7. PROGRAMMING WITH IMMEDIATE EXECUTION
8. PROGRAMMING WITH USE OF PRE-PROGRAMMING AND DIFFERENT
EXECUTION MODES
8.1. PRE-PROGRAMMING
8.2 . LOADING THE BLOCK-MEMORY
8.3. CLEARING THE BLOCK-MEMORY
8.4 . INITIATE COMMANDS
8.5. HOW TO EXECUTE THE PROGRAMMED OR INITIATED FUNCTIONAL
COMMANDS
8. 6. HOW TO PROGRAMME A TRIGGER
8. 7. PM-NUMBER ADDRESSED EXECUTION
8. 8. BLOCK-OPERATION
8.9 . SCAN FUNCTION
9. HOW TO SEE IF UNITS ARE READY WITH THE PROGRAMMED TASKS
10 . HOW TO SEE IF UNITS HAVE DATA AVAILABLE
11. PROGRAMMING FOR THE EXPERTS
12. ANNEX

2. HOW TO INTERCONNECT THE UNITS
by clipping the units on top of
each other
Press here, while moving down
the upper unit with the feet
in the
holes of the lower one.
Then release the button, by wich
the feet hook into the holes.
with cable-set PM2192
by using Rack-mount PM2193
ST4698
How to clip the units together
If more distance between the units is required (.5 m up to maximum 150 m) , only
the data-lines (data high twisted with data low) and the OV- lines may be used, not
the synchronization lines.
3

3. ADDRESS SELECTION
4
IEEE/IEC-bus address of the Master Unit
(selectable addresses are 10 ... 19)
ST4699
Warning: When an
even addresses is set, a
Service Request will occur
after a power-on reset
(not maskable).
Example of a
PM2101 with IEEEIIEC-device address 11 (default address)
Unit address of Functional Units
(consists of 2 fixed, type number dependent, and a third variable digit)
20
ST4700
Example of a PM2120 with unit address 203.

4. ADDRESSING A MESSAGE
Any message to System 21 is of course preceded by the IEEE/IEC address set on
the master unit.
Example:
IEC PRINT #11,"message"
or
OUTPUT 711; "message"
using P2000C
using HP85
sends the "message" to System 21 with IEEE/IEC address 11.
The routing of this message (to the master or to one of the slave units) is indicated
by the first element of the message, the "unit address".
This unit address is:
"AID" for the master (Additional Instrumentation Devices).
"AID" +3digits for the slave units.
These 3 digits consist of the last two digits of the type number of the unit + 1 digit
set on the unit address switch.
Separation between unit address and the following commands is ";" or
", ". If more
than one command is sent in one string, the individual commands have to be
separated by commas.
Examples:
Message Description
"AID;command" routes a "
command" to the master routes the two
''AID203;command,command'' commands to the unit PM2120 with address switch
set to 3
5

5. COMMANDS
Commands are given in ASCII-coded form. There are two types of commands:
1. Commands for the total System 21 that have to be routed to the master unit.
2. Commands for individual units that must be routed to the specific unit.
A full survey of these command codes can be found
in the annex (for master
commands and slave commands valid for all slaves) and in the operating cards of
the individual units (for specific unit dependent commands).
Examples:
Message Description
"AID;RESET" is a message to the master (AID) with the command
(RESET) to reset the system to the power-on conditions.
"AI0201;CLOSE2,0PEN4" is a message to the slave PM2120 with address setting 1
(AID201) with the commands to close switch 2 and to
open switch 4.
6. READING DATA FROM SYSTEM 21
To input data from System 21, first a command message requesting for this data has
to be sent and after that the system has
to be addressed as talker to read the data.
Example:
6
on P2000C on HP85
100 IEC PRINT #11,"AID311;1NP H"
100 OUTPUT 711;"AID311;1NP H"
110 IEC INPUT #11,R$
110 ENTER 711;R$
The first message is a request to the PM2131 with address switch set to 1 to send
the data, which is
on the input lines. With the second statement the data are read
from the system.
Note: An input statement always returns the result
of the last request for data.
Earlier sent requests are automatically cancelled.

7. PROGRAMMING WITH IMMEDIATE EXECUTION
In the default position after power-on, System 21 executes incoming commands
immediately in the order in which they are programmed. This is the most simple
and straightforward way of programming, involving a limited number of commands,
of which the most important are given below.
Function Message Description
System Reset "AID;RES" Resets the total System
21 to the
power-on conditions.
Unit Reset "AIDnnn;
RO " Resets slave with unit address "nnn"
to the power-on conditions.
Operating Mode "AIDnnn;Mm" Sets slave with address
"nnn" in
operating mode "Mm" (see operating
cards
of the units).
Functional Command "AIDnnn;cmd,
.. ,cmd" Sends the commands
"cmd" to the
unit with address
"nnn ".
Remarks:
1. The codes for the functional commands are unit dependent and can be found
on the operating cards of the units.
2. After a command requesting for the return of data, System
21 must be
addressed as talker to input the data into the controller.
3. A power-on system reset can also be realised
by pushing the RESET button
on the master unit (not allowed during a running program).
7

8. PROGRAMMING WITH USE OF PRE-PROGRAMMING AND
DIFFERENT EXECUTION MODES
8.1. PRE-PROGRAMMING
Each slave unit has a block-memory in which functional commands (that have to be
used repetitively) can
be pre-loaded. This block-memory has 20 memory positions,
each of which can contain up
to a full slave setting. The commands stored, can be
recalled from the memory positions serially or randomly by using INITIATE
commands (see 8.4.).
8.2. LOADING THE BLOCK-MEMORY
The block-memory is loaded by sending the commands to be stored, preceded by
"Pn" indicating the memory position at which the data have to be stored.
Examples:
"AID201;P3,CLOSE
O,OPEN 5" functional commands "CLOSE O,OPEN
5" are stored in block-memory position
3 (P3).
"AID201;PO,CLOSE 0-9;P1,0PEN
10-19 " "CLOSE 0-9" is stored in block-memory
position 0
(PO), "OPEN 10-19 " in
block-memory position 1 (P1).
8.3. CLEARING THE BLOCK-MEMORY
The block-memory is automatically cleared at reset or at a mode change of the unit.
It also can be cleared by sending "AIDnnn;R2". Individual positions of the block-
memory can be cleared by sending 'empty' commands ("Pn" not followed by
commands).
Examples:
8
"AID218;P10"
"AID218;P10-15"
"AID218;R2"
clears block-memory position 10.
clears block-memory positions 10 up to incl. 15.
clears the total block-memory with
general slave command "R2".

8-4. INITIATE COMMANDS
With initiate commands, it is possible to recall the functional commands from the
block-memory. There are two possibilities:
Random recall: One can recall (initiate) any block-memory position. This is done
by
"I n" where n ( =0 .. . 19) is the memory position to be initiated.
Serial recall: This is used with "Block Operation". For a description with
example see 8.8.
Example of a random recall at unit address 213:
"AID213;1 2"
Block-memory position 2 is initiated.
The initiating of commands from the block-memory is comparable with direct
programming. It does not automatically conclude that these commands are also
executed. Execution only follows when execution conditions are met (see next part).
8.5- HOW TO EXECUTE THE PROGRAMMED OR INITIATED
FUNCTIONAL COMMANDS
In the default position of the system, the execution of commands sent to the slaves
is immediately after receipt of the individual commands. This is the "Execute
Unconditional" mode.
To enable synchronisation of actions within a slave or
between different slaves, two further execution modes are available:
-"Execute on X" where programmed or initiated commands are simultaneously
executed on the first following character "X" received by the slave.
"Execute on Trigger" where programmed
or initiated commands are executed on
next trigger-impulse
on the System 21 internal trigger line (see 8.6).
These execution modes of the individual slaves can be programmed by the
following commands (example with unit address 312) :
Command Description
" AID312 ; E~U " Execute Unconditional mode
" AID312;E~X " Execute on command "X" mode
" AID312 ; E~T " Execute on Trigger mode (see 8.6)
9

8.6. HOW TO PROGRAMME A TRIGGER
(impulse on the trigger-line of the System
21 bus)
This can be done with
System 21 master command " AID;XCU~T "
or IEEE-bus command GET (Group Execute Trigger)
Examples:
Using on P2000C on HP85
master command
IEC PRINT #11 , "AID ; XCU~T " OUTPUT 711 ; " AID ; XCU~T "
IEEE command GET IEC TRIGGER # 11
TRIGGER 711
8.7. PM-NUMBER ADDRESSED EXECUTION
When only a group of identical units have to receive an execute command this can
be done by the command "AID;XCU nn" addressed to the master (see also 8.9.
"Scan Function"). "nn" stands for the last two digits of the slaves type number. This
execution command
is independent of execution mode setting.
Example:
"AID;
XCU 20" All PM 2120 units will execute their received commands (also initiate
commands), independent
on the execution modes selected.
8.8. BLOCK OPERATION
10
Block operation is the sequential execution of functional commands stored on
successive positions
at the block-memory, always starting with position 0 (serial
recall from memory; see also
8.4). Block operation is initiated by command "AIDnnn;
I~B [,n)". The section enclosed within ( ] is optional. "n" represents an integer
value 0 .......... 19 indicating the last block-memory position to be executed. Omitting
the value "n", the default value will be
19. After that, execution can be performed
step by step by giving
"X" or a trigger command, depending on the execution mode
selected, or a PM-number addressed execution command (see 8.7.). The Execute
Unconditional mode is not allowed for block operation. "Block operation, once
initiated, may only be followed by execution commands or request commands
(commands with
"?") . All other commands will cancel block operation.