Omron CQM1H - PROGRAM Programming Manual page 100

High-speed Counter Board
Reading High-speed
Counter Status
External outputs 1 to 4 are controlled by ORs performed on corresponding
bits (i.e., bits with the same bit number) in the comparison result bits 08 to 11
for high-speed counters 1 to 4. The user must determine which outputs
should be turned ON for each possible comparison result and set the bit pat-
terns so that the OR operations will produce the desired result.
Note Range Comparison Flags are supported by the built-in high-speed counter
(high-speed counter 0) and the Pulse I/O Board for ranges1 to 8. These flags,
however, are not supported by the High-speed Counter Board. The internal bit
patterns must be used to produce the same type of output result.
The following two methods can be used to read the status of high-speed
counters 1 to 4:
• Using CPU Unit memory words
• Using PRV(62)
Using CPU Unit Memory Words
The memory area words and bits in the CPU Unit that indicate the status of
high-speed counters 1 to 4 are given below.
Inner Board Error Codes
Word
Slot 1 Slot 2
AR 04
Operating Status Words
High-speed counter
High-speed counter 1
High-speed counter 2
High-speed counter 3
High-speed counter 4
The functions of the bits in each operating status word are as follows:
Bits
00 to 07 Comparison Results: Internal Output Bits
08 to 11 Comparison Results: External Output Bits for Outputs 1 to 4
The result of an OR operation on bits in same bit positions for all the
high-speed counters 1 to 4 will be output. (See note.)
12 Counter Operating Flag (0: Stopped; 1: Running)
13 Comparison Flag (0: Stopped; 1: Running)
14 PV Overflow/Underflow Flag (0: No; 1: Yes)
15 SV Error Flag (0: Normal; 1: Error)
Note The following table shows the relationship between external outputs 1 to 4
and Comparison Results External Output Bits.
High-speed
counter
Counter 1
Counter 2
Counter 3
Counter 4
Bits
00 to 07 Slot 1 The following 2-digit error codes are stored.
00 Hex:
08 to 15 Slot 2
01 or 02 Hex: Hardware error
03 Hex:
Slot 1
IR 208
IR 209
IR 210
IR 211
Function
External output
External output 1 OR of bits 08 of
IR 208 to IR 211
External output 2 OR of bits 09 of
IR 208 to IR 211
External output 3 OR of bits 10 of
IR 208 to IR 211
External output 4 OR of bits 11 of
IR 208 to IR 211
Section 2-1
Function
Normal
PC Setup error
Word
Slot 2
IR 240
IR 241
IR 242
IR 243
Slot 1 Slot 2
OR of bits 08 of
IR 240 to IR 241
OR of bits 09 of
IR 240 to IR 241
OR of bits 10 of
IR 240 to IR 241
OR of bits 11 of
IR 240 to IR 241
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