Input Pulse Value - Mitsubishi QD60P8-G User Manual

5 DETAILS AND SETTING OF FUNCTIONS

5.3 Input Pulse Value

Input pulse
value
Input pulse value
Counter reset request
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The pulse number entered into the QD60P8-G is stored into the "input pulse
value" of the buffer memory. This value is counted when the count enable (Y18
to Y1F) is ON.
The input pulse value is not converted into the unit pulse number by the pre-scale
function (refer to Section 5.6), unlike the "sampling pulse number" and
"accumulating count value" of the buffer memory. If an overflow error occurs, the
value is counted when the count enable (Y18 to Y1F) is ON.
The count type of the input pulse value is a ring counter of 0 to 2147483647.
to
2147483600 2147483646
Item Read value
0 to 2147483647
The buffer memory addresses for resetting the input pulse values are as follows.
Item
CH1
13
POINT
• The update timing of the input pulse value is fixed at 10ms. Therefore, take care
when using the module as a counter. (Refer to Section 5.9)
• When reading the input pulse value, always read two words together.
If it is read in single word unit, a wrong count value may be read due to a data
mismatch between the lower word and upper word when the count value is
updated halfway during read.
2147483647 0
Input pulse count value of 2147483647
incremented by 1 turns to 0.
CH1 CH2
10 42
11 43
Buffer memory address
CH2 CH3
45 77
1 2
Buffer memory address
CH3 CH4 CH5
74 106 138
75 107 139
CH4 CH5 CH6
109 141 173
MELSEC-Q
3
CH6 CH7 CH8
170 202 234
171 203 235
CH7 CH8
205 237
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