Watlow MICRODIN Manual de usuario Pagina 19

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19 Watlow MicroDIN Quick Start Guide
Indication Symptoms Probable Cause(s)
Troubleshooting Alarms and Errorsmost likely problems are listed first
Power
• No power. • Power supply switch off
• Fuse blown
• Breaker tripped
Error = off • Safety interlock door switch, etc.
• Separate system limit control may be latched
(Normal = • Open wiring
steady green) • Power 20V (ac/dc)
Communications
• Unit will not communicate. • MicroDIN address DIP switch incorrectly set
• MicroDIN baud rate DIP switch incorrectly set
• MicroDIN unit-to-unit daisy chain disconnected
• Reversed, short or open EIA-485 communications wiring
Error = off • EIA-485 converter box incorrectly wired
• Computer COM port incorrectly set up
(Normal = • Communications software setup or address incorrect
pulsing green) • Protocol or parity wrong, not 8, n, 1
• Needs termination and pull-up and pull-down resistors
Input Error
• Input is in error condition. • The sensor is improperly wired
• Sensor wiring reversed, shorted or open
• MicroDIN firmware setting does not = actual sensor
• Power 20V(ac/dc)
Error = steady red • Ambient environmental temperature out of spec for MicroDIN
• The MicroDIN open loop detect shows a broken sensor
(Normal = off ) • The calibration offset parameter is set much too high or low
Alarms
• Alarm won’t occur. • Alarm output off
• Alarm set points incorrect
• Alarm silenced
• Alarm sides incorrect
Alarm = steady red • In diagnostics mode
• Alarm won’t clear. • Alarm latched
(Normal = off) • Alarm set points incorrect
• Alarm hysteresis incorrect
• Input in error condition
Errors
Flashing LED Error 4
RAM malfunction
Indicator Light Error 5
EEPROM data corrupted
Pattern Error 6
PROM malfunction
Error 7
Logic hardware problem
Error 11
New firmware installed
Error 12
Calibration data corrupted
Error 13
Analog-to-digital hardware failure
Error 14
EEPROM hardware problem
Error 15
New unit first power up
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