SAFEPATH Manual
Sheet 59 of 78
Rev. C April 1999
Procedure T
If the digital voice module system normal LED is off, the digital voice module system trouble LED is on, and the digital voice module
trouble indicator LED flashes a 5-blink pattern, a serial port communication error has occurred. A serial port communication error
may be part caused by:
1. Invalid command received.
2. Incorrect baud rate.
3. Incorrect data format.
4. Parity
error.
5. Framing
error.
If the error was due to an invalid command received, the trouble will clear automatically on the next valid command received. If the
error was due to an incorrect baud rate or data format, the trouble will clear automatically after first valid data byte is received with
correct baud rate and data format. If the error was due to a parity or framing error, the trouble will clear automatically after the next
valid data byte is received.
When a serial communication error is indicated, perform the following:
1.
Verify that the digital voice module is connected to a system which supports the Wheelock serial port protocol and provides the
correct data format.
2.
Transmit a valid command to the digital voice module through the serial port.
If, after the above procedure is completed, the trouble condition persists, the trouble condition is caused by failed circuitry on the
digital voice module. There are no field correctable failed circuitry problems on the digital voice module. Digital voice modules with
failed circuitry shall be replaced immediately, following the “SAFEPATH Module Replacement Procedure”, set forth previously in this
section.
Procedure U
If the digital voice module system normal LED is off, the digital voice module system trouble LED is on, and the digital voice module
trouble indicator LED flashes a 6-blink pattern, a ground fault has been detected. A ground fault detected error may be caused by:
1.
Contact input wiring shorted to earth ground.
2.
DV-EM cable wiring shorted to earth ground.
3.
RS-232 and RS-485 wiring shorted to earth ground.
4.
Input power wiring shorted to earth ground.
5.
Ground fault detection sensitivity is set too high.
6.
Failed ground fault detection circuitry on the digital voice module.
If the error was due to one of the first five causes, the trouble will clear automatically when the cause is corrected.
When a ground fault detected error is indicated, perform the following:
1.
Check all contact input wiring for ground faults.
2.
Check all DV-EM cabling for ground faults.
3.
Check all RS-232 and RS-485 wiring for ground faults.
4.
Check all input power wiring for ground faults.
5.
Decrease the ground fault detection sensitivity level, following the adjustment procedure set forth in the Ground Fault Detection
Sensitivity Adjustment section of this manual.
If, after the above procedure is completed, the trouble condition persists, the trouble condition is caused by failed circuitry on the
digital voice module. There are no field correctable failed circuitry problems on the digital voice module. Digital voice modules with
failed circuitry shall be replaced immediately, following the “SAFEPATH Module Replacement Procedure”, set forth previously in this
section.
Summary of Contents for SAFEPATH SAPE-1AB
Page 19: ...SAFEPATH Manual Sheet 20 of 78 Rev C April 1999 Figure 3 Operator s Console...
Page 24: ...SAFEPATH Manual Sheet 25 of 78 Rev C April 1999 Figure 5 DX 100 Module Illustration...
Page 25: ...SAFEPATH Manual Sheet 26 of 78 Rev C April 1999 Figure 6 DX 200 Module Illustration...
Page 28: ...SAFEPATH Manual Sheet 29 of 78 Rev C April 1999 Figure 7 SAFEPATH Panel Mounting...
Page 32: ...SAFEPATH Manual Sheet 33 of 78 Rev C April 1999 Figure 8 Typical System Block Diagram...
Page 62: ...SAFEPATH Manual Sheet 63 of 78 Rev C April 1999 Figure 30 Module Layout of the SAFEPATH Panel...
Page 63: ...SAFEPATH Manual Sheet 64 of 78 Rev C April 1999 Figure 31 SAFEPATH Panel Block Diagram...
