871
High-speed Counter/Pulse Output Instructions Section 3-21
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.
Note CJ1M CPU Units with unit version 3.0 or later only.
■ Reading a PV (C = 0000 hex)
If C is 0000 hex, PRV(881) reads a PV as shown in the following table.
Index Registers --- --- ---
Indirect addressing
using Index Registers
--- --- ,IR0 to ,IR15
–2048 to +2047 ,IR0 to
–2048 to +2047 ,IR15
DR0 to DR15, IR0 to
IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area P C D
P: Port specifier C: Control data
0000 hex:
Read PV
0001 hex:
Read status
0002 hex:
Read range
comparison
results
00@3 hex: Read frequency
0003 hex:
Pulse
output read
high-speed
counter
frequency
0013 hex:
10-ms
sampling
method
0013 hex:
100-ms
sampling
method
0013 hex:
1-s
sampling
method
0000 or 0001 hex:
Pulse output
OK OK Not allowed. OK (See
note.)
Not allowed. Not allowed. Not allowed.
0010 or 0011 hex:
High-speed
counter input
OK OK OK OK (high-
speed
counter 0
only)
OK (See
note.)
(high-speed
counter 0
only)
OK (See
note.)
(high-speed
counter 0
only)
OK (See
note.)
(high-speed
counter 0
only)
0100, 0101, 0102,
or 0103 hex:
Interrupt input in
counter mode
OK Not allowed. Not allowed. Not allowed. Not allowed. Not allowed. Not allowed.
1000 or 1001 hex:
PWM (891) output
Not allowed. OK Not allowed. Not allowed. Not allowed. 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)
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