User guide

Communication Capabiliites
890 USE 108 00 August 2001 77
3-Position Slide
Switch Setting
Options
The following information provides detailed descriptions of the settings and
functionality enabled by the top, middle, and bottom slide switch settings.
Setting the slide switch to the top position assigns ASCII functionality to the ports;
the following communication parameters are set and cannot be changed.
The following table shows the values of the communication port parameters if the
slide switch is set to the top position (ASCII functionality).
Setting the slide switch to the middle position assigns remote terminal unit (RTU)
functionality to port 1.
The following table shows the values of the communication port parameters if the
slide switch is set to the middle position (RTU functionality). The values are fixed;
you cannot change them.
Parameter Value
Baud 2,400
Parity Even
Data Bits 7
Stop Bits 1
Device Address Front panel rotary switch setting for Modbus port 1 only
Parameter Fixed Value
Baud 9,600
Parity Even
Data Bits 8
Stop Bits 1
Device Address Front panel rotary switch setting for Modbus port 1 only