RS232 data log output
In addition to Modbus, an additional data stream showing actions within the COMBI
system is available via the RS232 output.
This consists of a 3 wire interface which can connect directly into the serial port (RS232)
connection on a PC which is a 9 way D-type female connector (not supplied). This should
be wired to the Combi system as follows.
D-type Pin COMBI RS232 connector (Bottom left of PCB)
2Tx
3Rx
50V
Using Hyper-terminal on the PC set up at 2400 baud 8 bit no parity and no handshake,
the data output should appear on the screen and consists of any text which is being
recorded in the event log.
Event log (9)
The events listed in appendix 1 are logged internally in the COMBI system.
A total of 99 events can be stored and viewed later either on the LCD or on a PC using
Hyper-terminal.
When this 99 event memory is full, the oldest event is replaced by the new event so this
history of events always represents the last 99 incidents.
Using ENGINEER’S menu number 9, this event memory can be viewed one event at a
time using the UP (1) and DOWN (5) buttons to scroll through the sequence. Date and
time of the event is also displayed.
With the RS232 cable connected to the PC and Hyper-terminal in use at 2400 baud the
whole event log can be sent using ENGINEERING menu 28.
Using capture text in Hyper-terminal, this event log can be saved to a file for future
examination or printing etc.
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