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Absolute Encoder Interface Board Section 2-3
Note These words are refreshed only once every cycle, so they may differ from the
actual PV.
Using PRV(62)
PRV(62) is used to read the PVs of absolute high-speed counters 1 and 2.
Specify absolute high-speed counter 1 or 2 in P (P=001 or 002).
The PV of the specified absolute high-speed counter is stored as shown
below. The PV is stored as 8-digit BCD, regardless of whether the Board is in
BCD Mode or 360
° Mode.
Note The PV can be read accurately at the time PRV(62) is executed.
Reading Absolute High-speed Counter Status
There are two ways to read the status of high-speed counters 1 and 2:
• Reading AR area flags
• Using PRV(62)
Reading AR Area Flags
The CQM1H words relating to absolute high-speed counters 1 and 2 are
listed below. It is possible to determine the status of absolute high-speed
counters 1 and 2 by reading these data words.
• Inner Board Error Codes
(@)PRV(62)
P
000
D
P: Port
001: Port 1
002: Port 2
D: First destination word
D+1
D
BCD Mode 360° Mode
0000 0000 to 0000 4095 0000 0000 to 0000 0359
Leftmost
4 digits
Rightmost
4 digits
Word Bits Function
AR 04 08 to 15 Slot
2
The stored error codes are as follows:
00 Hex: Normal
01 or 02 Hex: Hardware error
03 Hex: PC Setup error
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