Pinnacle Systems MG - Manual (Page 36)

Mute-out switch fault
The proper sequence of limit switch closures was
not correct and so the unit shut down. This could
also be due to excessive noise getting into the
PLC lines causing misinformation.
No ACK from memory
The SLAVE is requesting error messages from
the EEPROM memory chip but has not received
an acknowledge from it within the time allotted.
No clock line detected
SLAVE microprocessor could not detect this
signal line from the MASTER during a normal
scan of the curtain. Check for a faulty circuit in
the computer board.
No data line detected
SLAVE microprocessor could not detect this
signal line from the MASTER during a normal
scan of the curtain. Check for a faulty circuit in
the computer board.
No emitter line detected
SLAVE microprocessor could not detect this signal
line from the MASTER during a normal scan of
the curtain. Faulty circuit in the computer board.
No more error codes
This message appears after the control unit is
finished displaying all previously recorded error
messages stored in memory. You can start up the
curtain by pushing the RESET button when you
see this message.
Open LED in emitter pylon xxy
An LED in Emitter pylon was found not firing. xx
indicates board number in 4” increments from
circular connector; y indicates beam number
of that particular board (1 to 8). Could also be
a faulty cable, computer board, or R27 on the
computer board has burned open.
Power failure reset
SLAVE has reset due to either a power loss or
some condition that caused the SLAVE to lockup,
in which case the watchdog reset it.
RAM failure
MASTER OR SLAVE has determined that their
internal RAM cannot hold data correctly. Glitch
in power can cause this.
Receiver length fault xxy
The length of the Receiver pylon was detected
as different from the jumpers S3 set on the door
of the Controller Module. xx indicates board
number in 4” increments from circular connector;
y indicates beam number of that board (1 to 8).
This could be a cable pulled out, missing jumper
in the pylon, faulty circuit on the computer board.
Receiver Oscillating xxy
More than one pulse was detected during
reception of the proper Infrared signal. xx
indicates board number in 4” increments from
circular connector; y indicates beam number of
that board (1 to 8). This may indicate that the
detector circuit has a problem or a severe external
infrared problem was detected.
Reset held down
You have held the reset button down too long.
The SLAVE is trying to communicate with the
EEPROM memory chip.
SBLK
SLAVE microprocessor detected blockage when
the MASTER did not. Some of the receiver signals
are so weak that the leading edge of the pulse is
missed by the SLAVE but the trailing edge is not
missed by the MASTER. Re-align the pylons.
Serial data corrupted
The MASTER has requested data from the SLAVE
but the check-sum value received does not match
the value calculated from the data received.
1) Check for electrical noise. Add MOV’s from
each leg of safety relay output to earth ground.
2) Receiver pylon may be seeing an Emitter pylon
of a different light curtain. 3) Possibly a faulty
computer board or connection.
Serial data transfer incomplete
The MASTER has requested data from the SLAVE
and the SLAVE has not responded within the
allotted time. This can happen if you hold the
RESET button down at the wrong time.
Short LED in emitter pylon xxy
An LED in Emitter pylon was found not firing. xx
indicates board number in 4” increments from
circular connector; y indicates beam number of
that board (1 to 8). Could also be a faulty cable,
computer board, or R44 (R27 below Rev 5) on
the computer board has burned short.
Appendix “A”
Diagnostics and Troubleshooting
A-4