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APPENDICES
Appendix 3 Buffer Memory Areas
CH1 Counter function update flag
The value indicating whether the buffer memory areas for the selected counter function are updated or not is stored in this
area. When the buffer memory areas are updated, 1H is stored. When the buffer memory areas are not updated, 0H is stored.
The buffer memory areas shown above are updated without resetting this area. To check the update status once again, reset
this area by the following resetting method.
■Resetting method
Write 0H in this area using a program and reset this area.
When this area is used as an interlock, consider the scan time. Depending on the program used, immediately
after 0H is written by a program, either of the buffer memory areas shown above may be updated, and 1H
may be stored in this area.
■Buffer memory address
The following shows the buffer memory address of this area.
CH1 Signal monitor
The input statuses of the preset input terminal for the external input, function start input terminal, A phase input terminal, and
B phase input terminal, as well as the output statuses of the coincidence output point No.1 terminal and coincidence output
point No.2 terminal for the external output are stored.
■Buffer memory address
The following shows the buffer memory address of this area.
Counter function selection Buffer memory area
Latch counter function CH1 Latch count value (Un\G12 to Un\G13)
Sampling counter function CH1 Sampling count value (Un\G14 to Un\G15)
Cycle pulse counter function CH1 Cycle pulse count previous value (Un\G16 to Un\G17)
CH1 Cycle pulse count current value (Un\G18 to Un\G19)
CH1 Cycle pulse count difference value (Un\G24 to Un\G27)
Buffer memory address name CH1 CH2
CH Counter function update flag 28 60
Bit Stored status Stored value
b5 The output status of the coincidence output point
No.1 terminal is stored.
•ON (1)
•OFF (0)
b4 The output status of the coincidence output point
No.2 terminal is stored.
b3 The pulse input status to the phase A pulse input
terminal is stored.
b2 The pulse input status to the phase B pulse input
terminal is stored.
b1 The input status to the preset input terminal is
stored.
b0 The input status to the function start input terminal
is stored.
Buffer memory address name CH1 CH2
CH Signal monitor 29 61
b15 b3 b2 b1 b0
0000000000
b4b5b6
Bit data from b15 to b6 are fixed to 0.
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