AH500 Module Manual 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 Count cycle Lower-upper limit value Lower-lower limit value Alarm flags Bit 5 (Lower limit alarm) OFF Bit 4 (Upper limit alarm) OFF 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.
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. 7-24 ON ON OFF ON OFF ON