Mitsubishi Electric FX3G SERIES Programming Manual page 364

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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
Make sure that
5. Relationship between the comparison timing and the result output
1) The DHSZ instruction executes comparison and outputs the result only when a counting pulse is input to a high-
speed counter.
(When
S
1
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
6. Priority order in operation among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55)
instructions for the same high-speed counter
→ For details, refer to "6. Priority order in operation among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55)
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
8. Number of occupied devices
1) The comparison value occupies two devices from
2) The output occupies three devices from
362
S is smaller than or equivalent to
1
is "1000" and is "1999", the output
S
2
13 High-Speed Processing – FNC 50 to FNC 59
13.6 FNC 55 – HSZ / High-Speed Counter Zone Compare
S .
and comparison value 2
S
1
S .
2
is set to ON as soon as the current value of C235
D
instructions for the same high-speed counter" in Subsection 13.4.1.
S or S
1 2
.
D
(FNC 11) instruction]".
Subsection 13.4.1.
respectively.
S
2