GE Industrial Solutions HE300GEN150 - Manual (Page 44)

MAN0373-01 13 APR 2000 PAGE 45
APPENDIX A
APPENDIX A: COMM_REQ COMMAND BLOCK DESCRIPTIONS
COMMAND BLOCK FOR WRITE DEVICE DATAGRAM (14):
Address Command Length Number of words from Address+6 to Address+n
Address +1: No Wait 0
Address +2: Status Block Memory Type 70(%I),72(%Q),8(%R),10(%AI), or 12(%AQ)
Address +3: Status Block Offset Beginning address for COMREQ status
Address +4: Idle Timeout Value 0
Address +5: Max. Communication Time 0
Address +6: Command Number 14
Address +7: Device Number for Receiving Device 0-31, or 255 to broadcast message
Address +8: Function Code 20H (32)
Address +9: Subfunction Code (hex) 20H (32)
Address +10: Priority 0 for Normal, or 1 for High
Address +11: Datagram Length (in bytes) Number of bytes from Address+12 to Address+n
Address +12:
To Address +n:
Datagram Content Datagram Content
READ DEVICE DATAGRAM (15):
Address Command Length Number of words from Address+6 to Address+n
Address +1: No Wait 0
Address +2: Status Block Memory Type 70(%I), 72(%Q), 8(%R), 10(%AI), or 12(%AQ)
Address +3: Status Block Offset Beginning address for COMREQ status
Address +4: Idle Timeout Value 0
Address +5: Max. Communication Time 0
Address +6: Command Number 15
Address +7:
Device Number for Receiving
Device
0-31
Address +8: Function Code 20H (32)
Address +9: Subfunction Code (hex) 1EH (30)
Address +10: Priority 0 for Normal, or 1 for High
Address +11: Datagram Length (in bytes) Number of bytes from Address+12 to Address+n
Address +12: Subfunction Code of Reply (hex) 1FH (31)
Address +13: Memory Type for Reply 8(%R), 10(%AI), or 12(%AQ)
Address +14: Memory Offset Starting address within this memory type
Address +15: Maximum Data Memory Number of words required by reply
Address +16:
To Address +n:
Datagram Content Datagram Content