Micromod MOD: MODBUS RTU Communications Guide Manual de usuario descargar pdf (Pagina 22)

MODBUS RTU

COMUNICATIONS GUIDE

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.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 31 32

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Micromod MOD: MODBUS RTU Communications Guide Manual de usuario Pagina 22