260
Timer and Counter Instructions
Section 5-16
High-speed Counter Board
The following table shows the function of bits in D for high-speed counters 1 to
4 on a High-speed Counter Board.
Range Comparison
Results (C=002)
If C is 002, PRV(62) reads the results of the range comparison results for
Pulse I/O Board high-speed counters 1 and 2, or Absolute Encoder Interface
Board absolute high-speed counters 1 and 2.
Bits 00 through 07 of D contain the Comparison Result flags for ranges 1 to 8.
(0: Not in range; 1: In range)
PRV(62) reads the same information stored in the AR words allocated for that
purpose (AR 05 and AR 06 for the Pulse I/O Board or Absolute Encoder Inter-
face Board), but the allocated AR words are refreshed just once each cycle
while PRV(62) reads the most up-to-date values.
Flags
ER:
The specified port and function are not compatible.
Indirectly addressed EM/DM word is non-existent.
(Content of
*
EM/
*
DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
D+1 exceeds the data area boundary. (C=000)
There is an error in the operand settings.
PRV(62) is executed in an interrupt subroutine while a pulse I/O or
high-speed counter instruction is being executed in the main program.
Bit(s)
Function
00 to 07
Contains the internal bit pattern.
08 to 11
Contains the external bit pattern.
12
Counter Operating Flag (0: Stopped; 1: Operating)
13
Comparison Flag (0: Stopped; 1: Operating)
14
PV Overflow/Underflow Flag (0: Normal; 1: Overflow/underflow occurred)
15
SV Error Flag (0: Normal; 1: SV error occurred)
