Perle Systems 5500208-41 - Manual (Page 21)

21
Modbus Commands
Modbus Commands
Set Modbus Gateway
Description Sets the Modbus parameters for the IOLAN when it is operating as a Modbus Gateway.
User Level Admin
Syntax
Options addr-mode
broadcast
char-timeout
req-next-delay
exceptions
idle-timer
mess-timeout
port
req-queuing
remapped-id
set modbus gateway [addr-mode embedded|re-mapped]
[broadcast on|off] [char-timeout <number>]
[req-next-delay <number>] [exceptions on|off]
[idle-timer <number>] [mess-timeout <number>]
[port <TCP/UDP_port>] [req-queuing on|off]
[remapped-id <1-247>]
Determines if the original UID address will be embedded in the transmission header or
if a specified (remapped) UID will be embedded in the transmission header.
When enabled, a UID of 0 (zero) indicates that the message will be broadcast to all
Modbus Slaves. The default is Off .
Used in conjunction with the Modbus RTU protocol, specifies how long to wait, in
milliseconds, after a character to determine the end of frame. The default is 30 ms.
A delay, in milliseconds, to allow serial slave(s) to re-enable receivers before issuing
next Modbus Master request. The default is 50 ms.
When enabled, an exception message is generated and sent to the initiating Modbus
device when any of the following conditions are encountered: there is an invalid UID,
the UID is not configured in the Gateway, there is no free network connection, there is
an invalid message, or the target device is not answering the connection attempt. The
default is On.
Specifies the number of seconds that must elapse without any network or serial traffic
before a connection is dropped. If this parameter is set to 0 (zero), a connection will not
be dropped (with the following exceptions: the TCP KeepAlive causes the connection
to be dropped or the Modbus device drops the connection). The default is 10 seconds.
Time to wait, in milliseconds, for a response message from a Modbus TCP or serial
slave (depending if the Modbus Gateway is a Master Gateway or Slave Gateway,
respectively) before sending a Modbus exception. The default is 1000 ms.
The network port number that the Slave Gateway will listen on for both TCP and UDP
messages. The default is 502.
When enabled, allows multiple, simultaneous messages to be queued and processed in
order of reception. The default is
On .
Specify the UID that will be inserted into the message header for the Slave Modbus
serial device. Valid values are 1-247.