10
3.13
Alarms and Event Lamps
The number of alarms is different between PVs and communication PVs.
PV: 4 alarms
Communication PV: 2 alarms (can be set only for a single communication PV)
Event lamps EV1 to 4 are for PV alarms. EV5 and 6 are for communication PV alarms. EV8 is for
communication error indications. These indications are fixed. They cannot be changed.
Event lamps do not change their indications even when the operation screen is different.
The indications are fixed as follows:
Note: If the auto range function is enabled when FLOAT is in use, do not use the
communication PV alarms.
Table 3.12.1 Alarm function
Item
PV
Communication PV
Number of alarms
4
2
Type of alarm
Not set (0)
PV high limit (1)
PV low limit (2)
PV velocity (29)
Self-diagnostics (30)
FAIL(31)
Not set (0)
PV high limit (1)
PV low limit (2)
Standby
Allowed
Not allowed
Energize/De-energize
Allowed
Allowed
Latch
Allowed
Not allowed
PV velocity alarm time setpoint
Allowed
Not allowed
Hysteresis
Allowed
Allowed
On-delay timer
Allowed
Not allowed
Off-delay timer
Allowed
Not allowed
The required information can be output to DO by setting I relay number to AL1.S to AL4.S (see
“Setting Contact Output Function” in the standard UM33A IM). Table 3.12.2 shows the additional I
relays.
VOLt
Event lamp
1
～
4
PV alarm
display
Event lamp
8
Communication
Error display
Event lamp
5
～
6
Communication
PV alarm
display
