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Timer and Counter Instructions Section 5-16
The control data, C, determines which type of data will be accessed.
The following table shows which values of C can be used with each function.
High-speed Counter PV
(C=000)
If C is 000, PRV(62) reads the specified high-speed counter’s PV and writes
the 8-digit value in D and D+1. The leftmost 4 digits are stored in D+1 and the
rightmost 4 digits are stored in D. A hexadecimal value of F in the most signif-
icant digit of PV indicates that the PV is negative.
PRV(62) reads the same high-speed counter PV information stored in the IR
words allocated for that purpose (IR 230 and IR 231 for high-speed counter 0,
IR 200 to IR 207 or IR 232 to IR 239 for high-speed counters 1 to 4), but the
allocated IR words are refreshed just once each cycle while PRV(62) reads
the most up-to-date values.
CPU Unit: Built-in High-speed Counter 0
The following table shows the possible 8-digit BCD values for the PV of high-
speed counter 0.
Inner Board Function Port specifier (P)
Slot 1 Slot 2
Pulse I/O Board High-speed counter 1 or pulse
output 1
--- 001
High-speed counter 2 or pulse
output 2
--- 002
Absolute Encoder
Interface Board
Absolute high-speed counter 1 --- 001
Absolute high-speed counter 2 --- 002
High-speed Counter
Board
High-speed counter 1 101 001
High-speed counter 2 102 002
High-speed counter 3 103 003
High-speed counter 4 104 004
C Data Destination word(s)
000 High-speed counter PV D and D+1
001 Status of high-speed counter or pulse output D
002 Range comparison results D
Unit/Board Function Values of C
000 001 002
CPU Unit High-speed counter 0 YES --- ---
Transistor Output Unit Pulse output --- --- ---
Pulse I/O Board High-speed counters 1 and 2 YES YES YES
Pulse outputs 1 and 2 --- YES ---
Absolute Encoder Interface
Board
Absolute high-speed counters
1 and 2
YES YES YES
High-speed Counter Board High-speed counters 1 to 4 YES YES ---
Mode Possible values
Differential phase mode F003 2768 to 0003 2767
Incrementing mode 0000 0000 to 0006 5535
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