STX Signal Transmitter Installation and Operation ... - Kistler-Morse

Appendix D. MVS-STX Error Messages
B. Check wiring of the sensor to the junction
box and junction box to the STX PCB or
Termination PCB. Correct loose, damaged
(shorted), or incorrect wiring.
C. One or more sensors may be damaged.
Follow troubleshooting procedures
detailed in the sensor manual to locate
the damaged sensor. Replace if required.
D. Check the power supply by measuring
across the +Ex and -Ex on the STX PCB
or Termination PCB:
• If using K-M half-bridge sensors, verify
the voltage is approximately 12 Volts.
• If using foil-gage sensors, verify the
voltage meets the sensor
manufacturer’s requirements.
If the voltage is incorrect, adjust AdjEx
(Service/STX/AdjEx) until the correct
voltage is measured. See Chapter 8,
MVS-STX Service Menu. If you cannot
obtain the correct voltage, replace the
power supply.
E. Measure the voltage across the In+ and
In- terminals on the STX PCB or Termination
PCB. This is the actual signal
coming back from the sensor. For K-M
half-bridge sensors, the reading should
be less than 1 Volt.
• If the reading is less than 1 Volt, check
Gain (Service/STX/Gain). If Gain is set
correctly, the A/D converter is probably
damaged. Consult with K-M.
• If the reading is greater than 1 volt,
recheck wiring, sensors, and power
supply as described in Steps A
through D.
3. COM Error Adr:XX
Explanation
An external STX PCB at hexadecimal
address ‘XX’ has stopped responding to the
MVS’s microprocessor PCB.
In addition to the error message, this condition
is also indicated by the LEDs on the
microprocessor PCB in the MVS. When
serial communications are functioning
normally, the top two LED indicators flash.
If only the lower of the top two LEDs is
flashing, the microprocessor PCB is
attempting communications with no
response from the external STX.
Solutions
A. Ensure power is applied to the
external STX.
B. Check the hard-wired connections
between the MVS and external STX.
Correct loose, damaged (shorted), or
incorrect wiring.
C. The rocker arms on the S1 switch on the
STX PCB, which assign the serial
address, may not be set properly.
Check the rocker arm settings,
referring to Table 2-1 in Chapter 2,
Hardware Installation.
D. The serial parameters of the MVS and
the external STX may not match. Ensure
parameters match, referring to Serl in
Chapter 6, MVS-STX Inputs and Outputs
Menu, and to the MVS Installation and
Operation Manual.
4. STX Error Adr:XX
Explanation
An STX PCB installed in the MVS at hexadecimal
address ‘XX’ has stopped responding
to the MVS’s microprocessor PCB.
The hexadecimal address for an internal PCB
consists of two digits. The first digit indicates
the rack (1=1st rack, 2=2nd rack, etc.). The
second digit indicates the position in the
rack, with ‘1’ being the left-most position. For
example, an address of ‘12’ indicates the
STX PCB is in the first rack and is in the
second position from the left in the rack.
Solutions
A. The MVS may not recognize the
STX PCB. Rescan the MVS using the
Service/Micro/RScn/Auto/i2c_IO Menu.
See Chapter 8, MVS-STX Service Menu.
B. All channels may be disabled. Display
selected disabled channels again by
turning Enabe on, using the Service/
STX/Enabe Menu. See Chapter 8,
MVS-STX Service Menu.
C. The STX PCB may not be installed
properly. Ensure the PCB is inserted into
the card guides and is mated fully with
the backplane connector.
D. The STX PCB may be malfunctioning.
Replace the STX PCB. Restore the STX
PCB parameters using the Service/STX/
Rtor/STX Menu. See Chapter 8,
MVS-STX Service Menu.
D-2