Modbus IOG700AM-0xCR1, User Manual

Page: 348 / 395

Modbus Cellular Gateway
Index skipping is used to reserve slots for new function insertion, when required.
348
Maximum TCP
Connections
1. 4 is set by default
2. Range 1 to 4
Enter the allowed maximum simultaneous TCP connections.
TCP Keep ‐ alive
Unchecked by
default
Check the Enable box to ensure to keep the TCP session connected.
Trust IP Access
1. A Must fill setting
2. Allow All is set by
default
Specify authorized masters on the TCP network.
Select Allow All to allow any Modbus Master to reach the attached Slave(s).
Otherwise, limit only specific Master to reach the Slave(s) by selecting Specific IPs.
When Specific IPs is selected, a Trusted IP Definition window will appear. Refer to
the following Trusted Modbus Master sub ‐ section.
Specify Authorized Modbus Masters on the TCP network
Specify the Master(s) by their IP addresses to reach the serially attached Slave(s).
Trusted IP Definition Window
Item Value setting Description
Source IP
A Must fill setting
Select Specific IP Address to only allow an IP address of the allowed Master to
access the attached Slave(s).
Select IP Range to only allow a set range of IP addresses of the allowed Master to
access the attached Slave(s).
Select IP Address ‐ based Group to only allow pre ‐ defined group of IP address of the
allowed Master to access the attached Slave(s).
Note: group must be pre ‐ defined before this selection become available. Refer to
System > Grouping > Host grouping. You may also access to create a group by the
Add Rule shortcut button. Setting done through the Add Rule button will also
appear in the Host grouping setting screen.
Then check Enable box to enable this rule.
Save
N/A
Click the Save button to save the settings.
Simultaneous Dual Mode (Dual Mode)
AMIT gateway supports serially attached Modbus devices and, at the same time, allows gateway
information to be read by the Modbus Master in the existed Modbus Management Network. To allow
dual Mode, simply go through the settings described in the Modbus ‐ attached Mode section and the
Legacy Modbus Slave ‐ Device Mode section.