GE Multilin F650 - B.2.4 Generic Reading

B-4 F650 DIGITAL BAY CONTROLLER GEK-106310-AF
B.2 MODBUS F650 APPENDIX B: MODBUS PROTOCOL
B.2.4 Generic reading
MASTER/CLIENT SLAVE/SERVER
Request
Reading function 3 or 4:
+[A]+ +[B]+ +[C]--------------+ +[D]--+
01 04 01 09 00 01 XX XX
Data addr. Regs.
Reading function 66:
+[A]+ +[B]+ +[B1]++[C]--------------+ +[D]--+
01 42 00 01 09 00 01 XX XX
SG Data addr. Regs.
OK Response
Reading function 3 or 4:
+[A]+ +[B]+ +[C]------------------------+ +[D]--+
01 04 02 00 08 XX XX
Bytes...Data .....
Reading function 66:
+[A]+ +[B]+ +[C]------------------------+ +[D]--+
01 42 02 00 08 XX XX
Bytes...Data ..........
Error Response
R
e
ading function 3 or 4:
+[A]+ +[B]+ +[C]------------------------+ +[D]--+
01 84 03 XX XX
Error code...........
Reading function 66: