CTI Products HIB-232 Serial Interface - Manual (Page 18)

HIB Hardware Reference Troubleshooting
CTI Products, Inc.
68-10855-210
14
11. Troubleshooting
This table is a list of troubleshooting tips specific to the HIB module. For
additional troubleshooting tips, refer to the troubleshooting section found in the
Monitoring and Control Network System Manual, reference 1.
Due to the high percentage of surface-mount components, the HIB is treated as a
field replaceable unit. If any system problems are the result of a malfunctioning
HIB unit, the entire unit must be replaced and returned for repair.
PROBLEM CAUSE
MCNRCD is not
showing correct
status
OR
Operator cannot
FORCE VOTE or
DISABLE the
receivers
Connect the cable between the HIB and the PC. Make sure
Option A, switch 5 is in the DOWN position. If not, change the
switch and reset the HIB.
PC to HIB Data
Verify that approximately every 5 seconds, a short burst of data
occurs on the HIB HOST connector, pin 3, RXD (± 3 to ± 12 Vdc
swing). If not, verify the continuity of the cable:
DE9 pin 3 to DB25 pin 2
If the wire is OK, the PC COM port is not functioning properly.
HIB to PC Data
Verify that about every 5 seconds, a short burst of data occurs on
the PC’s COM port connector, pin 3, RXD (± 3 to ± 12 Vdc
swing). If not, verify the continuity of the cable:
DE9 pin 2 to DB25 pin 3
If the wire is OK, the HIB is not functioning properly. Replace
the HIB.
Control Signals
Verify that HIB HOST connector pins 4 (DTR) and 7 (RTS) are
active (+6 to +12 Vdc). If not, verify the continuity of the cable:
DE9 pin 4 to DB25 pin 20
DE9 pin 7 to DB25 pin 4
If the wires are OK, the PC COM port is not functioning properly.
Verify that PC COM port connector pins 5 (CTS) and 6 (DSR)
are active (+6 to +12 Vdc). If not, verify the continuity of the
cable:
DE9 pin 8 to DB25 pin 5
DE9 pin 6 to DB25 pin 6
If the wires are OK, the HIB is not functioning properly. Replace
the HIB.
System doesn't work Verify that you have the proper CTIHIB.SYS driver loaded.