SGW1-IA3-MMP – Modbus Multiplexer
Exemys
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SGW1-IA3-MMP User’s Manual Rev. 1
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EXCEPTION: Enables or disables the SGW1-IA3-MMP to respond or not to
exceptions in case of communication errors.
If the option is disabled the SGW1-IA3-MMP will respond to the errors with silence,
otherwise, it will return an exception code that we detail below:
0x0A: This exception is caused by: The message has the address (ID) of a device
that is not configured in the slave table.
0x0B: This exception occurs for: No response was received within the maximum
message wait time (Message response time).
3.3
RTS Control Configuration
The SGW1-13B0-00-IA3-MMP-CF can handle the RTS pin on port A for the activation of the
transmission in devices, such as a radio modem.
The RTS pin handles a timer, which will activate a time before sending data through the
serial port and will turn off a time after the end of the shipment. This option applies only to
port A on the device.
Command
Description
RTSLOGIC:
(0|1)
Sets the RTS polarity.
• 0000 = Inverted. / 1111 = Normal.
Example of use:
RTSLOGIC:1
RTSDON:
(0..1000)
[ms]
Configures the delay prior to sending data.
• Value = 0 ... 1000 [ms].
Example of use:
RTSDON:50
RTSDOFF:
(0..1000)
[ms]
Sets the delay after sending data.
• Value = 0 ... 1000 [ms].
Example of use:
RTSDOFF:20
Since firmware version 2.2
2.2
2.2
2.2, if RTSDON is set to 0, the RTS pin will stay steady ON of OFF
according to the value configured with
RTSLOGIC
.
3.4
Slave ranges, Configuration
In SGW1-IA3-MMP it is possible to limit the ranges of slaves that can be accessed by each of
the masters independently. If the slave attempted to interrogate is not within the allowed
ranges, the request is ignored.
It is also possible to apply an Offset to the ID of the Modbus queries that arrive from the
masters before sending them to the corresponding slave port. This allows you to change the
ID with which the slaves are read from the point of view of the masters.
