
Function code 8 (Diagnostics)
The diagnostics function provides means for checking the communication between MODBUS
master and slave. The function uses a sub-function code to select the functionality.
The following sub-function codes are supported:
Sub-function code
Name
Description
0
Return query data
The data passed in the request data field will be returned (loo‐
ped back) in the response. The entire response message should
be identical to the request.
1
Restart communications option
After having restarted the communication, select the baudrate,
framing or Modbus address to get access to the device again.
Function code 17 (Report Slave ID)
The transmitter will respond to a Report Slave ID request from the master by giving information
about device type, vendor, and firmware version in a format as shown:
Response
Slave address
1 byte
Function code
1 byte
17
Byte count
1 byte
62
Slave ID
1 byte
Sensor device type
0: SITRANS FC
Run indicator
1 byte
255: Running
Manufacturer name 12 bytes
SIEMENS
Product name
32 bytes
SITRANS F
Product firmware
version
16 bytes
-
CRC
2 bytes
4.9
Access control
Access control manages whether the Modbus master is allowed to modify device parameters.
Reading of parameters is always possible. The general access control rules are:
● The Modbus interface has an access level that can be changed by providing PIN information
via the Modbus register 8292 (User PIN) or 8293 (Expert PIN).
● Each parameter has a protection level assigned that specifies the required access level to
modify the parameter via the Modbus interface.
● If the access level of the Modbus interface is lower than the protection level of the parameter
that is desired to be modified, then the attempt to modify the parameter is rejected by the
device.
MODBUS commands
4.9 Access control
FCT030 Modbus (From firmware 4.0)
40
Function Manual, 06/2018, A5E39931813-AB
Содержание SITRANS F Coriolis FCT030
Страница 6: ...Table of contents FCT030 Modbus From firmware 4 0 6 Function Manual 06 2018 A5E39931813 AB ...
Страница 16: ...Communication 2 4 Connecting FCT030 Modbus From firmware 4 0 16 Function Manual 06 2018 A5E39931813 AB ...
Страница 194: ...Definitions A 1 Definitions FCT030 Modbus From firmware 4 0 194 Function Manual 06 2018 A5E39931813 AB ...
Страница 198: ...Index FCT030 Modbus From firmware 4 0 198 Function Manual 06 2018 A5E39931813 AB ...