4
Setting up the Communications Mode
4a
Select the Communications Mode
(RS-232 or RS-485)
The programmer supports the following
communication modes:
?
RS-232 (single programmer channel
– see 4b)
?
RS-485 (1 - 16 programmer channels
- see 4c)
The required Communications Mode can be
selected using DIP Switch 5:
?
ON – RS-232 (default)
?
OFF – RS-485
Please refer to section 3 for a full description
of both modes.
4b
RS-232 Communication Mode
?
?
Single Channel RS-232 Operation
Connect Programmer to PC COM Port or
other RS-232 Control System via RS-232
cable.
?
?
Set the ‘RS-232/RS-485’ DIP Switch to
‘RS-232’
Set the Programmer Communications
Node Address to ‘0’ (factory default
setting)
4c
RS-485 Communication Mode
?
?
Multiple channel RS-485 Operation
Set the ‘RS-232/RS-485’ DIP Switch to
‘RS-485’
?
?
Programmer now uses either of the RS-
485 ports on the rear panel of the
module.
Set the required Communications
address using the DIP switches 1-4 as a
binary weighted address in the range 0 –
15.
20
PPM3 MKII Programmer - User Guide - V1.04 - 10 th May 2008
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