Digital Controller

E5AK/E5EK

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■ How to Use the Error Display

When an error has occurred, the No.1 display alternately indicates error codes together with the current display item.

This section describes how to check error codes on the display, and the actions that must be taken to remedy the problem.

Meaning

Input is in error.

Action

Check the wiring of inputs, disconnections, and shorts, and check the input type and the input type jumper con-

nector.

Operation at Error

For control output functions, output the manipulated variable matched to the setting of the “MV at PV error” param-

eter (level 2 mode). Alarm output functions are activated when the upper limit is exceeded.

Meaning

Internal memory operation is in error

Action

First, turn the power OFF then back ON again. If the display remains the same, the E5AK/E5EK Controller must

be repaired. If the display is restored to normal, the probable cause may be external noise affecting the control

system. Check for external noise.

Operation at Error

Control output functions turn OFF (2 mA max. at 4 to 20 mA output, and output equivalent to 0% in case of other

outputs). Alarm output functions turn OFF.

Meaning

Internal circuits are in error.

Action

First, turn the power OFF then back ON again. If the display remains the same, the E5AK/E5EK Controller must

be repaired. If the display is restored to normal, the probable cause may be external noise affecting the control

system. Check for external noise.

Operation at Error

Control output functions turn OFF (2 mA max. at 4 to 20 mA output, and output equivalent to 0% in case of other

outputs). Alarm output functions turn OFF.

This error is output only during temperature input and is displayed for two seconds when the power is turned ON.

Meaning

Calibration data is in error.

Action

Must repair.

Operation at Error

Both control output functions and alarm output functions are active. However, note that the readout accuracy is not

assured.

Meaning

Though not an error, this is displayed when the process value exceeds the display range when the control range

(setting range

±10%) is larger than the display range (−1999 to 9999).

• When less than “

−1999”

• When greater than “9999”

Operation

Control continues, allowing normal operation.

Input Error

Memory Error

A/D Converter Error

Calibration Data Error

Display Range Over