Supported Function Codes; Application Functions; Diagnostic Functions - ABB 615 Series ANSI Manual

Section 3
Vendor-specific implementation
3.2
3.2.1
3.2.2
14
Table 5: Common (instance independent) Modbus TCP/IP diagnostic counters
Counter Description
CnReject No The amount of connection requests that are rejected due to unavailable TCP sockets.
sockets
CnReject Not reg The amount of connection requests that are rejected since the client is not registered.

Supported function codes

Application functions

Table 6: Supported application functions
Function
Name
code
01 Read coil status
02 Read digital input status
03 Read holding registers
04 Read input registers
05 Force single coil
06 Preset single register
08 Diagnostics
15 Force multiple coils
16 Preset multiple registers
23 Read/write holding registers

Diagnostic functions

The diagnostic functions are only intended for serial communication. However, the serial
diagnostic counters can be read, but not reset, via the Modbus TCP/IP interface. The serial
line cannot be forced to the listen mode via the Modbus TCP/IP interface.
Table 7: Supported diagnostic subfunctions
Function
Name
code
00 Return query data
01 Restart communication option
04 Force listen only mode
10 Clear counters and diagnostic register
1MAC052634-MB D
Description
Reads the status of discrete outputs.
Reads the status of discrete inputs.
Reads the contents of output registers.
Reads the contents of input registers.
Sets the status of a discrete output.
Sets the value of a holding register.
Checks the communication system between
the master and the slave.
Sets the status of multiple discrete outputs.
Sets the value of multiple holding registers.
Exchanges holding registers in one query.
Description
The data in the query data field is returned
(looped back) in the response. The entire
response is identical to the query.
The slaves peripheral port is initialized and
restarted and the communication event
counters are cleared. Before this, a normal
response will be sent provided that the port
is not in the listen only mode. If the port is in
the listen only mode, no response will be
sent.
The slave is forced to enter the listen only
mode for Modbus communication.
All counters and the diagnostic register are
cleared.
615/620 series ANSI
Communication Protocol Manual