Ip Address And Port; Configuration Parameters - Digi SkyCloud Z4500 Series User Manual

Modbus TCP Client for Automation Control
I/O Type
Holding Coil
Discrete Input
Input Register
Holding Register

IP Address and Port

Modbus TCP Client is configured to listen for incoming connections on both the Ethernet LAN and the
wireless WWAN. The default listen port is set to 1502 but the port number may be changed if
necessary. If Automation Control is acting as both a Modbus TCP Master and Modbus TCP Client, be
careful to avoid port conflicts.

Configuration Parameters

There are a number of parameters associated with Modbus TCP Client that may need to be
configured for certain applications. These parameters are kept in an internal file that can be modified
if necessary. In order to modify them, you will use the TCO editor function.
The configuration file is /etc/conf.d/opt.rtu_modbus_tcp_client and contains the following
parameters:
Parameter
RESPTOSE
RESPTOUSEC
BYTEOSE
BYTEOUSEC
ALWAYSON
PORT
DEBUG
COFF
BOFF
HOFF
IOFF
WOFF
WSWAP
Welcome to Digi SkyCloud
Input Address Range
00001 - 00999
10001 - 10999
30001 - 30999
40001 - 40999
Description
These parameters define response timeout second and response timeout
microseconds. This defines how long the Modbus Client will wait for a response
before timing out.
These parameters define the maximum time allowed between received
characters.
These parameters define the maximum time allowed between received
characters.
This parameter sets the TCP listen port for Modbus Client.
If Debug is set to 1 (on), many diagnostic messages will be generated in syslog.
The logread command may be used to review them. Debug should always be set to
0 (off) during normal operation.
Coil offset, Bit offset, Holding offset, and Input offset allow you to assign an offset
to each class of Modbus device type when necessary. As an example, if a server
requires that holding registers have a base address of 400001 and Z45 Controller
Automation has holding registers located at location 1001, you can set
HOFF="399000"
As mentioned earlier, both input and output addresses start at 1 in Automation
Control. WOFF adjusts the offset of outputs based on its value. By default, WOFF is
set to 1000 giving the first output an address of 1001.
Defaults to "0" (no swapping). This parameter controls the read order of 32 bit
IP Address and Port
Output Address Range
01001 - 01999
11001 - 11999
31001 - 31999
41001 - 41999
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