Delta AH500 - Page 256

AH500 Module Manual
7-24
The operation of the upper limit alarm and the operation of the lower limit alarm are as shown
below.
Upper-upper
limit value
Upper-lower
limit value
Lower-upper
limit value
Lower-lower
limit value
Alarm flags
Bit 5 (Lower limit alarm)
Bit 4 (Upper limit alar m)
Count cycle
OFF
OFF
ON
ON
If the upper-upper limit value is equal to the upper-lower limit value, and the lower-upper limit
value is equal to the lower-lower limit value, the operation of the upper limit alarm and the
operation of the lower limit alarm are as shown below.
OFF
OFF
ON
ON
Upper-upper
limit value
Upper-lower
limit value
Lower-upper
limit value
Lower-lower
limit value
Alarm flags
Bit 5 (Lower limit alarm)
Bit 4 (Upper limit alarm)
5. Bit 4 in CR4/CR32/CR60/CR88: If bit 4 in CR4/CR32/CR60/CR88 is turned OFF, the
accumulation register counts linearly. If bit 4 in CR4/CR32/CR60/CR88 is turned ON, the
accumulation register counts circularly.