Quick reference, Menu, Series 920 response to error codes – Watlow Series 920 Microprocessor-Based Ramping Control User Manual

Page 79: Clearing an error code, How to clear an alarm code

Series 920 Response to Error Codes

ER1 Codes Shut Down Outputs

The Series 920 will shut down its outputs whenever
an ER1 code occurs. An ER1 code usually repre-

sents a Series 920 malfunction.

Check These Items First
Anytime you see an ER1 error code, check for
these four items first, then follow the recommended

action listed by the code:
a) Low line voltage

b) Noisy environment, noise event
c) Vibration
d)

Temperature or moisture over specification

ER2 Codes Do Not Shut Down Outputs

ER2 error codes are data communication system
related, or file programming related.

Alarm Messages
ALM1

HI occurring

ALM1 _LO occurring

ALM2_Hl occurring

ALM2_LO occurring

Alarm Code

Clearing an Error Code

To clear an Error Code from the alphanumeric

display, first correct the problem, then return to the
SYSTEM menu. Use the MODE keys to reach the

ER1 or ER2 parameter and press ENTER.

Press

ENTER or transmit a 0.

If the code returns, or if

the 920 replies to a data communicated “? ER1 ” or

“? ER2” query with the same code, the problem still
exists. Refer to the Series 920 manual or the

Series 920 Data Communications Manual.

ER1, ER2, and ALM can only be cleared

when in the SYSTEM menu.

How to Clear an Alarm Code

An alarm code will alternately flash with the pa-

rameter that you are presently on. If the LAT alarm

value is NLAT, your alarms are non-latching and
will clear automatically when the ACTUAL display
value returns to within the normal operating band.

If LAT = LAT, the alarms are latching.

First correct the alarm condition and return to the

SYSTEM menu

Press the MODE key until you

see the CLR ALARM parameter. Press ENTER to

clear latching alarms that are no longer in an alarm

condition.

RUN

One of the three step types will be displayed
depending on the type of step

PROGRAMmed.

JUMPLOOP, STOP, and LINK step types are

immediate, and will not be visible.

. . . . . . ...” . . . . . .....

..... . . . . . . . . . . .. . . ...

SETPOINT

. . . . . . . . . . .

- 00:00:00

To SYSTEM Menu

Appendix

WATLOW Series 920 User’s

Manual