EKI-6333AC-4GP User Manual
90
Timeout Retries
If the slave does not respond to the Master’s request, the gateway
will resend the request stored in the buffer. If timeout retries is set
to null (value zero), the gateway would not buffer Master requests.
If a value other than zero is specified, the gateway would store the
Master request in the buffer and retries to send the request in a
number of specified times.
Once the retries are exhausted, the gateway will send a Modbus
error message to the Master. However, if the
0Bh Exception
box
is checked (see below), a 0Bh hex code based-error message will
be send instead.
Value Range: 0 ~ 5.
0Bh Exception
Check
Enable
checkbox to enable gateway to send a 0Bh
exception code message to Modbus Master to indicate that the
slave device does not respond within the timeout interval.
Tx Delay
Check
Enable
checkbox to activate to the minimum amount of
time after receiving a response before the next message can be
sent out. When Tx Delay is enabled the gateway would insert a Tx
delay between Master requests. The delay gives sufficient time for
the slave devices to turn their transmitters off and their receivers
back on.
TCP Connection Idle
Time
Enter the idle timeout in seconds. If the gateway does not receive
another TCP request before the idle timeout elapsed, the TCP
session will be terminated automatically.
Value Range: 1 ~ 65535.
Maximum TCP
Connections
Enter the allowed maximum simultaneous TCP connections.
Value Range: 1 ~ 4.
TCP Keep-alive
Check
Enable
checkbox to ensure to keep the TCP session
connected.
Modbus Master IP
Access
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, the
Trusted IP Definition
function appears.
Trusted IP Definition
The function is only available when
Modbus Master IP Access
is
Specific IPs
. Click
Edit
to fill in the IP definition settings.
Source IP:
–
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).
Enable:
Check
Enable
checkbox to enable this rule.
Note:
Group must be pre-defined before this selection become
available. Refer to
Object Definition
>
Grouping
>
Host
Grouping
. You may also access to create a group by the
Add Rule shortcut button. Setting done through the
Add
button will also appear in the
Host Grouping
screen. Then
check
Enable
checkbox to enable this rule.
Item
Description
