Siemens SIPROTEC 7SJ62 Technical Data

7SJ61/62/63 6MD63 - Modbus
C53000-L1840-C001-01
2-1
2 Supported Modbus functions
Supported Modbus functions
2
The following Modbus functions are supported by the Modbus slave of
the SIPROTEC device:
Function
code
Function
name
Description
Broadcast
supported?
1
1 Read Coil
Status
(0x-Register)
Reading one or several coil status registers of the Modbus slave.
A maximum of 1970 registers can be read with one message.
The coil status registers reflect the ON/OFF status of discrete outputs
of the SIPROTEC device.
no
2 Read Input
Status
(1X-Register)
Reading one or several input status registers of the Modbus slave.
A maximum of 1970 registers can be read with one message.
The input status registers reflect the ON/OFF status of discrete inputs
and the status of the protection function of the SIPROTEC device.
no
3 Read Holding
Registers
(4X-Register)
Reading one or several holding registers of the Modbus slave.
A maximum of 125 registers can be read with one message.
The holding registers contain device status annunciations, measured
values – mean values and metered measurands.
no
4 Read Input
Registers
(3X-Register)
Reading one or several input registers of the Modbus slave.
A maximum of 125 registers can be read with one message.
The input registers contain recorded measured values.
no
5 Force Single
Coil
(0x-Register)
Writing (force to ON or OFF) one coil status register (and binary output
of the SIPROTEC device assigned with that).
Use function code 15 to force multiple coil status registers.
yes
6 Preset Single
Register
(4X-Register)
Function presets a value into a single holding register.
Use function code 16 to preset multiple holding registers.
There are none writable holding registers for the SIPROTEC devices at
present.
yes
7 Read
Exception
Status
This function responses the value of the eight exception status coils to
the Modbus master.
The Modbus slave of the SIPROTEC device uses coil status register
257..264 as exception coils.
no
8 Diagnostics This function provides diagnostic values to the Modbus master.
Subfunctions 0 and 2 are implemented.
•
Funktion 0:
The data passed in the query data field of the message to the
slave is to be returned (looped-back) in the response.
•
Funktion 2:
The contents of the diagnostic register is returned in the response
to the master. For this the contents of the holding register 129 is
used.
no
1
Broadcast messages from Modbus master to the Modbus slaves using slave address 0 in the modbus message
(ref. to paragraph "Processing of broadcast messages" in chap. 1).

Siemens SIPROTEC 7SJ62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SJ62
Category	Relays
Language	English