Watlow Series 920 Microprocessor-Based Ramping Control - Manual (Page 79)

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
1
2
4
8
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
I
condition.
RUN Menu
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 79