Siemens SIMATIC TI500 Manual de usuario descargar pdf (Pagina 61)

Modbus Commands

C-12

TIWAY I Gateway User Manual

Modbus Function Descriptions (continued)

Code

05 allows a designated coil [discrete output Y or C, depending on the

position of Switch 10 on the network dipswitches] to be written. Depending

on the code passed in the data field, it can be changed to On (1) or Off (0),

forced On or Off, or unforced. The two-byte codes are the following.

FF00 (hex)

ON.

. . . . . . . . .

0000 (hex) OFF.

. . . . . . . . . .

NOTE:

All other values are illegal and will result in error response 03.

Where the Broadcast address (00) is used, the Gateway will send the change

coil command to all attached secondaries.

[This command is comparable to Primitive 30, using TT

-type 4 (Y coils) or

type 5 (Cs).]

Because

of differences in memory mapping between Modbus PLCs

and SIMA

TIC TI PLCs, you should be quite certain of the effects of

the broadcast command before issuing it.

Example:

I000000

Request: 07 05 0064 FF00 XXXX

Checksum (XXXX)

OFF/ON code (FF00 = On)

Coil address (0064)

Function code (05)

Slave address (07)

Figur

e C-13

Write

a Single Coil Example — Request

This request to secondary 7 is asking for coil 0064 (100 decimal) to be

changed to the on state.

Code 05 — W

rite a

Single Coil

WARNING

1 2 ... 56 57 58 59 60 61 62 63 64 65 66 ... 93 94

Comentarios a estos manuales

Sin comentarios

Siemens SIMATIC TI500 Manual de usuario Pagina 61

Comentarios a estos manuales

Relacionado con productos y manuales para Gateways / Controladores Siemens SIMATIC TI500