UNI-T UT321 User Manual download pdf (Page 38)

2-12

IM 05D01D12-41E 6th Edition: Mar. 25, 2005-00

Note 1: The fault diagnosis output turns on in case of input burnout, A/D converter failure, or reference junction compensation

(RJC) failure.

The control output in case of input burnout or A/D converter failure is set to the value of the PO (Preset Output Value)

setup parameter. In case of RJC failure, the controller continues control under the condition of “RJC = OFF”.

Note 2: The FAIL output is on during normal operation and turns off in case of failure.

Note 3: The difference of alarm action between the alam type codes 3 to 8, 13 to 18 and 33 to 38, 43 to 48 in the table above

is as follows.

The codes 3 to 8, 13 to 18 are effective for current setpoints. (For example, they are effective for the ramp rate setpoint

at SP switching.)

The codes 33 to 38, 43 to 48 are effective for target setpoints. (For example, they are not effective for the ramp rate

setpoint at SP switching.)

Treated

as normal

C

Power-on

Time

The alarm output does not

turn on in this region even

if the PV value is below the

low limit of the alarm setpoint.

Low limit of

alarm setpoint

Normal Abnormal

The alarm

output turns on.

Stand-by Action

It is effective in the following cases where;

- the power is turned on

- the target setpoint is changed

- the target setpoint number is switched

(however, except for remote setpoint)

- the alarm type is changed

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UNI-T UT321 User Manual Page 38