Siemens SIMATIC TI505 Manual de usuario descargar pdf (Pagina 67)

Modbus Commands

2-36

SIMATIC TI505/TI500 MODNIM User Manual

Modbus Function Descriptions (continued)

Code

17 permits the user to get information from the slave concerning its

type, run mode, and other device-dependent data.

[This command has no direct equivalent to a TIW

Y I request, but elements

of this function are contained in Primitives 02 and 03 (Status primitive and

Configuration primitive).]

The MODNIM returns a number in the Slave ID field determined by the

type of PLC connected and responds with the state of the RUN light. In

addition, it returns the HH status field, the EE auxiliary power source field,

the communications port in use, and the software version number

Example:

Request: 03 11 XXXX

Checksum (XXXX)

Function code 17 (1

1 hex)

Slave address (03)

Figure 2-32 Report

Slave ID Example — Request

This example shows a request to secondary address 03 to report its ID and

associated data.

03 11 06 3C FF 01 00 0A 30 XXXX

Checksum (XXXX)

Release 3.0

Port A operational (0A)

Auxiliary power (00)

Operational mode (01)

Run light (FF = On)

Slave ID (3C = TI530C)

Number of bytes (06)

Function code 17 (1

1 hex)

Slave address 030)

Response:

Figure 2-33 Report

Slave ID Example — Response

This response indicates that 6 bytes have been returned. These bytes show

that the Slave ID is a TI530C PLC, the RUN light is On, the operational

mode is 01, auxiliary power is good, and the operational port is A. The last

byte contains the software version number (see T

able 2-7).

Code 17 — Report

Slave ID

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 90 91

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Siemens SIMATIC TI505 Manual de usuario Pagina 67

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