Parker Products COMPAX-M /-S (L) - Manual (Page 159)

Interfaces
PLC data interface (function not available with COMPAX 1000SL)
159
Unit
hardware
Connector
assignment / cable
Technical data
Configuration
Positioning and control functions
Optimization
functions
Interfaces
Accessories /
options
Status
Parameter
Error list
Function code
BCD coded Command
F-code1 F-code2
0 1 POSA
0 2 POSR
0 4 SPEED
0 5 ACCEL
0 6 GOTO
1 3 Modify parameters (P1-P49)
1 4 VP (valid parameter)
1 6 Query status (S1-S12)
♦ PLC assigns the sign (4 bit) to I8...I11.
♦ Once the data is stable, the PLC sets the UBN to "1".
♦ COMPAX reads the sign and sets RDY to "0".
♦ PLC sets UBN to "0".
♦ COMPAX sets RDY to high.
If the data direction is then reversed, COMPAX can set the RDY line to "0". This is
the case for the last sign of a status query.
♦ PLC sets UBN to "1".
♦ COMPAX assigns the sign (4 bit) to O8...O11.
♦ COMPAX sets RDY to "1"
♦ PLC reads the sign and sets UBN to "0".
♦ COMPAX sets RDY to "0".
If the data direction is then reversed, COMPAX can set the RDY line to "1". This is
the case for the last sign of a status response.
Signal procedure using the example of a status query
PLC
Data
4 Bit
COMPAX
Data
4 Bit
PLC
UBN
COMPAX
RDY
t
valid valid valid
valid valid valid
valid valid
PLC COMPAX COMPAX PLC PLC COMPAX
It is important that the data ready message is only assigned after the data
(when using PLC, one cycle later); i.e. once the data has been safely
assigned.
If a fault means that the signal "RDY" is missing, the interface can be reset to its
initial status using signal "E" (start sign). The next "UBN" is then detected even
though "RDY" is missing.
Function codes of
commands
Procedure for
transmitting a
sign
Exception:
Process for
receiving a sign
Exception:
Reset interface