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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
13 High Speed Processing – FNC 50 to FNC 59
13.6 FNC 55 – HSZ / High Speed Counter Zone Compare
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
Control
2. Device specification range
Only high speed counters (C235 to C255) can be specified as .
3. Only 32-bit operation instructions are available.
Because instructions for high speed counters are dedicated to 32 bits, make sure to input "DHSZ (FNC 55)".
4. Caution on values set in the comparison value 1 and comparison value 2
Make sure that is smaller than or equivalent to .
5. Relationship between the comparison timing and the result output
1) DHSZ instruction executes comparison and outputs the result only when a counting pulse is input to a high speed
counter.
(When is "1000" and is "1999", the output is set to ON as soon as the current value of C235
changes from "999" to "1000" or from "1999" to "2000".)
2) Because the comparison result cannot be obtained when restoring the power or when the PLC mode switches
from STOP to RUN, the result is not output even if the comparison condition is provided.
→ For details, refer to "13.6.1 Program in which comparison result is set to ON when power is turned ON [ZCP
(FNC 11) instruction]".
6. Priority order in operation among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55)
instructions for a same high speed counter
→ For details, refer to "6. Priority order in operation among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55)
instructions for a same high speed counter" in Subsection 13.4.1.
7. Reset operation by an external terminal
→ For details, refer to "5. Reset operation by an external terminal [M8025*1: HSC (external reset) mode]" in
Subsection 13.4.1.
8. Number of occupied devices
1) The comparison value occupies two devices from or respectively.
2) The output occupies three devices from .
S
S
1
S
2
S
1
S
2
S
1
S
2
D
S
1
S
2
D