2. Programming Concepts
MN05003003E For more information visit: www.eaton.com
2-121
Function Explanation
D1172 2-phase output frequency (12Hz~20KHz)
D1173 2-phase output mode selection (k1and k2)
D1174 Lower bit of 32-bit of 2-phase output pulse target number
D1175 Upper bit of 32-bit of 2-phase output pulse target number
D1176 Lower bit of 32-bit of 2-phase present output pulse number
D1177 Upper bit of 32-bit of 2-phase present output pulse number
Function Explanation:
1. Output frequency = 1/T as shown in the figure below. There are two output modes, k1 and k2,
k1 means A phase gets ahead of B phase and k2 means B phase gets ahead of A phase.
Output number calculation adds 1 once there is a phase difference, such as figure below,
there are 8 output pulses. When output numbers attains, M1174 will be ON and if you want to
clear M1174, you should close M1172.
12 78
Y0(A)
Y1(B)
T
2. Output frequency, output target number and mode selection can be modified when
M1172=ON and M1174=OFF. The modification of output frequency and output target number
will not affect present output pulse number but mode selection modification will clear present
output pulse number to 0. Present output pulse number will be updated once scan time
updates and it will clear to 0 when M1172 is from StopÆRun, and keep that last output
number when M1172 is from RunÆStop.
Note:
This function just can be used at RUN mode and can exist in program with PLSY instruction. But if
instruction PLSY is executed first, this function cannot be used, and vice versa.
Function Group
VR Volume
Number
M1178~M1179, D1178~D1179
Contents:
For the ELC-PC/PH/PV controllers, the definition of special D and special M of built-in 2 points VR
Variable resistor function:
Function
M1178 Start VR0
M1179 Start VR1
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