Amit IWP87DAM-07151, Руководство пользователя

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PoE AP Router
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Timeout Retries
0 is set by default 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
The box is unchecked
by default.
Check the Enable box 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
The box is unchecked
by default.
Check the Enable box 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.
Setup TCP/IP Connection for Receiving Modbus Master Request
The following Modbus TCP Configuration items allow user to set up the TCP connection settings so that the
remote Modbus Master can access to the Modbus gateway. Besides, it also allows user to specify authorized
masters on the TCP network.
Item Value setting Description
TCP Connection
Idle Time
1. 300 is set by default
2. Range 1 to 65535
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
1. 4 is set by default
2. Range 1 to 4
Enter the allowed maximum simultaneous TCP connections.
Value Range : 1 ~ 4.
TCP Keep ‐ alive
The box is unchecked
by default.
Check the Enable box to ensure to keep the TCP session connected.
Modbus Master IP
Access
Allow All is selected 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 dialog will appear.
Specify Trusted Modbus Masters on the TCP network
When Specific IPs is selectes, user has to specify the Master(s) by their IP addresses to reach the serially
attached Slave(s).