Micromod MOD: MODBUS RTU Communications Guide - Manual (Page 22)

MODBUS RTU
COMUNICATIONS GUIDE
18
MODCELL MLP WITH TCP QUICKPANEL
Table 9. Wiring for RS-485 Full Duplex
QuickPanel jr. Modcell MLP
TXA 11 ————— 29-1 Rx+
TXB 15 ————— 29-2 Rx-
RXA 10 ————— 30-1 Tx+
RXB 16 ————— 30-2 Tx-
Frame Ground 1 — Shield
RTS 4 ——
CTS 5 ——
CTSB 18 ——
DTRB 19 ——
CTSA 21 ——
DTRA 22 ——
PLC & Protocols
SIO/CN1 PLC Modicon Modbus is used when QuickPanel is Master to MLP
Modicon Modbus Slave is used when QuickPanel is slave to MLP
Port
Electrical Format: RS-422/485 Full duplex
Baud rate, Data bits, Parity and Stop Bits to match the MLP configuration
Handshake: None
Protocol
PLC ID: Modbus address of the MLP
Tags
Analog points are read from the MLP as an integer value (16-bit).
MLP floating-point numbers are not supported by this interface.
Addressing
Registers are referenced as a type and offset. Below are examples for Input Registers and Output (Holding)
Registers.
Table 10. TCP QuickPanel Addressing
ML to MSC SROIN1 Modbus Address QuickPanel Tag
Entry 1 30001 IR001
Entry 2 30002 IR002
ML to MSC SRWIN1
Entry 1 40001 OR001
Entry 2 40002 OR002
If connecting more than one slave to the QuickPanel, append an underscore and Modbus address to the tag.
Example:
QuickPanel is configured to access PLC ID 1
For MLP at address 2, with the same registers as above, the tags would be IR001_2, IR002_2,
OR001_2 and OR002_2.