Instruction manual

7.0 TROUBLESHOOTING

7.1 ERROR MESSAGES

“<Input Name> (AI_#) Input” High or High-High Alarm (one for each, use name defined)

This error message is caused by the 4-20 mA signal from a transmitter exceeding the user-programmed

value for the high alarm limit.

Possible Causes Corrective Actions

The process value being measured by the Determine the reason for the out of spec transmitter

transmitter is out of specifications condition.

The high alarm limit for the process being Increase the high limit in the Other 4-20 mA

measured is set too low. Input Page.

There is a problem with the transmitter that

needs to be addressed by the manufacturer of

the transmitter.

“<Input Name> (AI_#) Input” Low or Low-Low Alarm (one for each, use name defined)

This error message is caused by the 4-20 mA signal from a transmitter being lower than the user-

programmed value for the low alarm limit.

Possible Causes Corrective Actions

The process value being measured by the Determine the reason for the out of spec transmitter

transmitter is out of specifications. condition.

The low alarm limit for the process being Decrease the low limit in the Other 4-20 mA

measured is set too high. Input Page.

There is a problem with the transmitter that

needs to be addressed by the manufacturer of

the transmitter.

<Input Name> (AI_#) Sensor Error

This error message is caused by a 4-20 mA input signal that is less than 3.9 mA or greater than 21 mA.

Possible Causes Corrective Actions

Faulty transmitter. Make sure that the transmitter is functioning

by measuring the output using an ammeter. If the

output directly from the transmitter is less

than 4 mA, the transmitter is the problem.

Faulty wiring between transmitter and Repeat the measurement of the transmitter

analog input. output at the 4-20 mA input option board

terminal strip. If this is less than 4 mA, then the

wiring is faulty. Also make sure that the

wires are attached to the correct terminals as

defined in the 4-20 mA Input Page.

Faulty analog input. Replace the Process Monitor board.