Omron CJ1M-CPU21 - Page 113

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HIGH-SPEED COUNTER PV READ: PRV(881) Section 5-2
Description PRV(881) reads the data specified in C for the port specified in P. The possi-
ble combinations of data and ports are shown in the following table.
■ Reading a PV (C = 0000 hex)
If C is 0000 hex, PRV(881) reads a PV as shown in the following table.
P: Port specifier C: Control data
0000 hex:
Read PV
0001 hex:
Read status
0002 hex:
Read range
comparison
results
0003 hex:
Read high-
speed
counter
frequency
0000 or 0001 hex:
Pulse output
OK OK Not allowed. OK (CJ1M
CPU Units
with unit ver-
sion 3.0 or
later only)
0010 or 0011 hex:
High-speed counter
input
OK OK OK OK (high-
speed
counter 0
only)
0100, 0101, 0102, or
0103 hex: Interrupt
input in counter mode
OK Not allowed. Not allowed. Not allowed.
1000 or 1001 hex:
PWM (891) output
Not allowed. OK Not allowed. Not allowed.
Port and mode Operation Setting range
Pulse output (P =
0000 or 0001 hex)
The present value of the
pulse output is stored in
D and D+1.
8000 0000 to 7FFF FFFF hex
(−2,147,483,648 to
2,147,483,647)
High-speed
counter
input (P =
0010 or
0011 hex)
Linear
Mode
The present value of the
high-speed counter is
stored in D and D+1.
8000 0000 to 7FFF FFFF hex
(−2,147,483,648 to
2,147,483,647)
Ring
Mode
0000 0000 to FFFF FFFF hex
(0 to 4,294,967,295)
Interrupt inputs in
counter mode
(P = 0100, 0101,
0102, or 0103 hex)
The present value of the
interrupt input is stored
in D.
0000 to FFFF hex
(0 to 65,535)