Mitsubishi Electric FX3G SERIES Programming Manual page 357

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
6. Priority order in operations among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55)
instructions for the same high-speed counter
1) FX /FX PLC
3U 3UC
When the same comparison value is used for the same high-speed counter in the HSCS, HSCR and HSZ
instructions, reset (self-reset) of the comparison target high-speed counter for the HSCR instruction is executed
with the highest priority (as shown in the table below).
In this case, the comparison results do not change in HSCS, HSCR, and HSZ instructions whose comparison
value is programmed to be the same as the comparison value for self-reset by HSCR instruction.
To change the comparison results, set the comparison value to "K0".
2) FX PLCs
3G
In FX PLCs, the HSCS, HSCR and HSZ instructions are executed in the order of programming.
3G
M8000
M8000
FNC 55
DHSZ
FNC 11
DZCPP
M8000
Operation of FX /FX
3U 3UC
Present value
500
250
0
Y000 to Y002 and Y006 do not change.
Y003
ON ON
Y004
OFF
It does not change.
OFF
Y005
*1. To change the comparison results by the instructions (1)
to (3) and (5), change the comparison value "K500" in the
instructions (1) to (3) and (5) to "K0".
*2. To set Y005 to ON in the HSZ instruction (4), set a value
smaller than the comparison value "K500". However, due
to the response delay at the output, the output may not
operate within the short time before the counter's present
value is reset to "0".
C235 K10000
FNC 53
K500 C235 Y000
DHSCS
FNC 53
K500 C235 Y001
DHSCS
FNC 54
K500 C235 Y002
DHSCR
K250 K500 C235 Y003
K250 K500 C235 Y003
FNC 54
K500 C235 Y006
DHSCR
FNC 54
K500 C235 C235
DHSCR
Self-reset program
PLC
*1
*2
13 High-Speed Processing – FNC 50 to FNC 59
13.4 FNC 53 – HSCS / High-Speed Counter Set
Program
sequence
FX /FX
3U
DHSCR (6)
DHSCS (1)
(1)
(self-reset)
DHSCS (2) DHSZ (4)
DHSCR (3) DHSCS (1)
(2)
DHSZ (4) DHSCS (2)
DHSCR (5) DHSCR (3)
(3)
DHSCR (6)
DHSCR (5)
(self-reset)
*1.Only FX PLCs support the DHSZ instruction.
3G
(4)
(5)
(6)
Operation of FX /FX
3G 2N
[reference]
Present value
500
250
0
Y000,Y001
Y002
Y003
ON
Y004
Y005
*1. Due to the response delay at the output, the output
may not operate within the short time before the
counter's present value is reset to "0".
Processing sequence
FX /FX /FX
3G 1N
FX /FX
3UC 2N 2NC
FX
1NC
DHSCS (1) DHSCS (1)
DHSCS (2) DHSCS (2)
DHSCR (3) DHSCR (3)
*1
DHSZ (4)
DHSZ (4)
DHSCR (5) DHSCR (5)
DHSCR (6) DHSCR (6)
(self-reset) (self-reset)
/FX /FX /FX /FX PLC
2NC 1N 1NC 1S
ON
OFF
Present value:1
ON
ON
*1
Present value:1
355
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12
13
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1S
14
15
16
17
18
19
20