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Mitsubishi Electric FX5 User Manual Page 224

Melsec iq-f series.
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■Operation Description
The content of the operation when ON and when OFF is as follows.
Operation when ON
High-speed comparison table operating
When the high-speed counter current value and the high-speed comparison
table set value or the DHSCS, DHSCR, DHSZ instruction set value are equal,
the specified bit device is set or reset.
These devices also operate when the FX3 compatible high-speed counter function is valid.
■Update timing
The timing of device update is as follows.
ON
• Match output driven by the DHIOEN instruction
• ON execution by DHSCS, DHSCR, DHSZ instruction
High-speed comparison table (high-speed compare instruction) error occurrence
This device turns ON when driving the DHSCS, DHSCR, and DHSZ instructions in excess of the limitation of the number of
instructions driven at the same time or driving the high-speed comparison table in excess of the limitation of the number of the
tables starting at the same time.
■Corresponding devices
The device numbers corresponding to each channel are as follows.
CPU module
CH1
CH2
CH3
SM4982
■Operation Description
The content of the operation when ON and when OFF is as follows.
Operation when ON
• DHSCS, DHSCR, DHSZ instructions operated in excess of the limitation of
the number of instructions driven at the same time.
• An operation was made in excess of the limit of number of tables of the high
speed comparison table starting at the same time.
• Even when this device turns ON, if the operation setting of the CPU module operation upon error detection
setting (Page 157 CPU Module Operation Upon Error Detection Setting) is "Continue", the DHSCS,
DHSCR, DHSZ instructions within the range of the number of instructions driven at the same time will
operate. For the limitation of the number of instructions driven at the same time, refer to MELSEC iQ-F
FX5 Programming Manual (Instructions, Standard Functions/Function Blocks).
• These devices also operate when the FX3 compatible high-speed counter function is valid.
24 HIGH-SPEED INPUT/OUTPUT FUNCTION
222
24.1 High-speed Counter Function
CH4
CH5
CH6
CH7
Operation when OFF
High-speed comparison table stopped
Even when the high-speed counter current value and the high-speed
comparison table set value or the DHSCS, DHSCR, DHSZ instruction set
value are equal, the specified bit device does not change.
OFF
• Match output stopped by the DHIOEN instruction and DHSCS, DHSCR,
DHSZ instructions all OFF
• Power ON, reset, STOP, PAUSE
High-speed pulse input/output module
First module
Second module
CH8
CH9
CH10
CH11
SM4986
SM4990
Operation when OFF
When there is no error
DHSCS, DHSCR, DHSZ instructions, and high-speed comparison table can
operate
Third module
Fourth module
CH12
CH13
CH14
CH15
SM4994
SM4998
CH16

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