Detcon PI-700 User Manual
Page 30
Model PI-700
PI-700 Instruction Manual
Rev. 2.5
Page 26 of 54
condition has been cleared. If a Sensor Fault occurs, the 4-20mA signal will be set at 0mA until the fault
condition is resolved.
Processor Fault
If the detector has any unrecoverable run-time errors, a “Processor Fault” is declared. A “Processor Fault”
will cause a “Fault Detected” message to flash intermittently on the ITM display. The Modbus™ fault register
bit for Processor Fault will be set and will not clear until the fault condition has been cleared. If a Processor
Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved.
Memory Fault
If the detector has a failure in saving new data to memory, a “Memory Fault” is declared. A “Memory Fault”
will cause the “Fault Detected” message to flash intermittently on the ITM display. The Modbus™ fault
register bit for Memory Fault will be set and will not clear until the fault condition has been cleared. If a
Memory Fault occurs, the 4-20mA signal will be set at 0mA until the fault condition is resolved.
4-20mA Loop Fault
If the sensor detects a condition where the 4-20mA output loop is not functional (high loop resistance or failed
circuit function) a “4-20mA Fault” is declared. A “4-20mA Fault” will cause the “Fault Detected” message to
scroll once a minute on the ITM display. The Modbus™ fault register bit for Loop Fault will be set and will
not clear until the fault condition has been cleared. If a Loop Fault occurs, the 4-20mA signal will be set at
0mA until the fault condition is resolved. If the 4-20mA current loop is still out of tolerance, contact Detcon
at
, or contact Detcon customer service.
Input Voltage Fault
If the detector is currently receiving an input voltage that is outside of the 11.5-28VDC range, an “Input
Voltage Fault” is declared.
An “Input Voltage Fault” will cause the “Fault Detected” message to flash
intermittently on the ITM display. The fault register bit for Input Voltage Fault will be set and will not clear
until the fault condition has been cleared. If an Input Voltage Fault occurs, the 4-20mA signal will be set at
0mA until the fault condition is resolved.
Temperature Fault
If the detector is currently reporting an ambient temperature that is outside of the –40C
° to +75C° range a
“Temperature Fault” is declared. A “Temperature Fault” will cause the “Fault Detected” message to flash
intermittently on the ITM display. The Modbus™ fault register bit for Temperature Fault will be set and will
not clear until the fault condition has been cleared. If a Temperature Fault occurs, the 4-20mA signal remains
operational.
AutoSpan Fault
If 180 days has elapsed since the last successful AutoSpan, an AutoSpan Fault will be generated.
An
“AutoSpan Fault” will cause the “Fault Detected” message to flash intermittently on the ITM display. The
Modbus™ fault register bit for AutoSpan Fault will be set and will not clear until the fault condition has been
cleared by executing a successful AutoSpan. If an AutoSpan occurs, the 4-20mA signal remains operational.