Watlow Electric Revision 5 - Manual (Page 69)

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the Edit or Run mode. Select the Run mode. If the SYSTEM 32 does not
answer, a communications error message will appear on the display [see
11.3 and 11.4].
11.3 Communications Problems
If the computer is functioning properly [section 11.1] then the communication
interface, cables and connections must be checked. A number of problems have
been traced to bad cables or connections.
11.3.1 Serial Interface
The serial interface must be correctly installed in the computer and set
according to the manufacturers directions. ANASOFT-32 communicates
using Comm Port 1. Some multi-function interface cards allow setting of
the comm port -- this should be done correctly. In addition be careful that
only one communications channel is set as comm port 1.
When the communications interface is correctly installed a scope can be
used to check the transmit line to insure characters are being sent to the
SYSTEM 32.
If a scope is not available, a test program [contact ANAFAZE] can be used
that will display sent and received characters. The transmit line and the
receive line can be disconnected from the SYSTEM 32 and connected
together at the SYSTEM 32. The program can be run and characters typed
on the keyboard will be sent to the SYSTEM 32 and returned to the
computer directly on the communication line. If these characters are
displayed on the monitor, the communication card, and the wiring can be
assumed correct. Carefully re-connect the SYSTEM 32 and go to section
11.4.
11.4 SYSTEM 32 Problems
A preliminary check of the SYSTEM 32 can be accomplished using the indicator
lights on the Processor [A32-PIOM PROCESSOR I/O MODULE]. The lights
function as follows:
11.4.1 Processor: Ready Light -- Green, Communications -- Orange
The Green Processor Ready light is the most important SYSTEM 32
indicator. If the green light is not on, the PIOM is not running and the
SYSTEM 32 cannot operate.
If no other indicator lights are on, the power supply probably is not working.
If the orange light is on, or is flashing, but the green light is not on, then the
power supply is at least putting out a voltage.
But if the green light is not on, don't worry about what the computer is
doing, or about communication problems. If the green light is not on,
nothing will work.