Chapter 7 High-speed Counter Module AH02HC/AH04HC 1. Bit 0 in CR4/CR32/CR60/CR88: If bit 0 in CR4/CR32/CR60/CR88 is turned ON, the input contacts will be normally-closed contacts. If bit 0 in CR4/CR32/CR60/CR88 is turned OFF, the input contacts are normally-open contacts. 2. Bit 1 in CR4/CR32/CR60/CR88: If bit 1 in CR4/CR32/CR60/CR88 is turned ON, the function of prescaling the number of input pulses will be enabled. If bit 1 in CR4/CR32/CR60/CR88 is turned OFF, the function of prescaling the number of input pulses will be disabled. The function of prescaling the number of input pulses converts the number of input pulses into the corresponding physical quantity.
Number of sampled pulses =Number of pulses count during a cycle x Prescale value x Unit magnification (Number of input pulses count during a cycle) 7-21 bit# Description OFF: The function is disabled. ON: The function is enabled. 4 Setting the accumulation register OFF: The accumulation register counts linearly. ON: The accumulation register counts circularly. 5 Setting the function of comparing the number of accumulated pulses with the comparison value set OFF: The function is disabled. ON: The function is enabled. 6 Selecting a type of comparison condition OFF: ≧ ON: ≦ (*. Bit 5 in CR4/CR32/CR60/CR88 must be turned ON.) 7 Setting the function of outputting a hardware signal OFF:
The function is disabled. ON: The function is enabled. (*. Bit 5 in CR4/CR32/CR60/CR88 must be turned ON.) 8 Setting the function of sending a message which asks the CPU module to execute the interrupt subroutine specified to the CPU module OFF: The function is disabled. ON: The function is enabled. (*. Bit 5 in CR4/CR32/CR60/CR88 must be turned ON.) 9 Setting the function of clearing the number of sampled pulses, the number of accumulated pulses, and the number of input pulses OFF: The function is disabled. ON: The function is enabled. 10 Setting the polarity of the input contact of the external signal OFF: Normally-open contacts ON:
Normally-closed contacts 11~15 Reserved Item Setting value Parameter CH0 CH1 CH2 CH3 Selecting a prescale function (Unit magnification) 0: x1 1: x0.1 2: x0.01 3: x0.001 4: x0.0001 #5 #33 #61 #89 Setting a prescale value 0~32767 #6 #34 #62 #90