Elapsed Value Hold Function; Overview - Panasonic FP7 User Manual

Counter Function

7.4 Elapsed Value Hold Function

7.4.1 Overview

• The elapsed value hold function is a function which holds the elapsed value of the counter at
the time of the trigger input signal from an external device.
• The elapsed value hold function is available only for CH0 and CH1. Each elapsed value is
transferred to the hold value areas allocated to each channel.
• It will be valid by turning on the signal (CHx LATCH EN) with a user program.
• The input logics (ON -> OFF edge, and OFF -> ON edge) which enable trigger input signals
can be switched by the signal (CHx TRG LOG).
 I/O allocation
Name
CHx IN-A
CHx IN-B
CHx RST
CHx MASK
CHx TRG
CHx LATCH EN
CHx TRG LOG
(Note 1): The above I/O numbers are those for the slot number 1 and the starting word number 10. The I/O numbers
actually used vary according to the slot number where the unit is installed and the starting word number.
 Unit memory (UM) allocation
Name
Counter elapsed
value area
Counter hold value
area
 Configuration
When allocating "High-speed counter" to the inputs (X100-X107) on the Multi I/O Unit Setting
dialog box, check the box of "Elapsed value hold mode".
7-12
CH0 CH1 Description
X100 X104
X101 X105
They occupy the counter areas for external inputs (4 points for each
channel).
X102 X106
X103 X107
X108 X10C Trigger input signal by an external input.
Enables the elapsed value hold function.
Y114 Y116
Switches the valid condition of trigger input signals.
When this is on, the ON -> OFF edge of the trigger signals (X8, XC) is
Y115 Y117
valid.
When this is off, the OFF -> ON edge of the trigger signals (X8, XC) is
valid.
CH0
UM00110-UM00111
UM00114-UM00115
CH1
UM00112-UM00113
UM00116-UM00117