Parker Compax3

Parker EME
Control via RS232 / RS485 / USB
192-120113 N08 C3I12T11 - December 2010
311
timeout period between 2 codes received is fixed to 5ms (5 times the code time at
9600Baud)
Write object - WrObj telegram
SZ
Adr
L
D0
D1
D2
D3 ... Dn
Crc(Hi)
Crc(Lo)
0xCX n Index(Hi) Index(Lo) Subindex Value 0x.. 0x..
Describing an object by a value.
Positive acknowledgement - Ack-telegram
SZ
L
D0
D1
Crc(Hi)
Crc(Lo)
0x06 1 0 0 0x.. 0x..
Answer from Compax3 if a writing process was successful, i.e. the function could
be executed and is completed in itself.
Negative acknowledgement - Nak - telegram
SZ
L
D0
D1
Crc(Hi)
Crc(Lo)
0x07 1 F-No.(Hi) F-No.(Lo) 0x.. 0x..
Answer from Compax3 if access to the object was denied (e.g. function cannot be
executed at that point in time or object has no reading access). The error no. is
coded according to the DriveCom profile resp. the CiA Device Profile DSP 402.
Read object - RdObj - telegram
SZ
Adr
L
D0
D1
D2
D3
D4
D5
...
Dn
Crc(Hi)
Crc(Lo)
0xAX n Index1(Hi) Index1(Lo) Subindex1 Index2(Hi)
Index2(L
o)
Subindex2 ... ... 0x.. 0x..
Reading one or several objects
Answer - Rsp - telegram
SZ
L
D0 ... Dx-1
Dx ... Dy-1
Dy-D..
D ... D..
D ... Dn
Crc(Hi)
Crc(Lo)
0x05 n Value1 Value 2 Value 3 Value .. Value n 0x.. 0x..
Answer from Compax3 if the object can be read.
If the object has no reading access, Compax3 answers with the Nak - telegram.
Reading object "StatusPositionActual" (o680.5):
Request: A5 03 02 02 A8 05 E1 46
Response: 05 05 FF FF FF FF FE 2D 07 B4
Writing into an Array (o1901.1 = 2350)
Request: C5 02 08 07 6D 01 00 09 2E 00 00 00 95 D5
Response: 06 01 00 00 BA 87
Checksum calculation for the CCITT table algorithm
The block securing for all codes is performed via the following function and the
corresponding table:
The “CRC16” variable is set to “0” before sending a telegram.
Example:
Block securing: