Delta Electronics Programmable Logic Controller DVP-PLC User Manual
Page 299
7 Application Instructions API 50-99
D V P - P L C A P P L I C AT I O N M A N U A L
7-15
API Mnemonic
Operands
Function
54
D HSCR
High Speed Counter Reset
Controllers
ES/EX/SS SA/SX/SC EH/SV
Bit Devices
Word Devices
Program Steps
Type
OP
X Y M S K H
KnX KnY KnM KnS T
C
D
E
F
S
1
*
*
*
*
*
*
*
*
*
*
S
2
*
D
*
*
*
*
DHSCR: 13 steps
PULSE 16-bit 32-bit
ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV ES EX SS SA SX SC EH SV
Operands:
S
1
: Comparative value S
2
: No. of high speed counter D: Comparison result
Explanations:
1.
S
2
has to designate the No. of high speed counters C235 ~ C255. See remarks of API 53 DHSCS for more
details.
2.
D
of EH/EH2/SV series MPU can designate the No. of high speed counters C241 ~ C254 that are the same as
the counters designated by S
2
.
3.
D
of SC series MPU can designate the No. of high speed counters C243, C245, C250 and C255 that are the
same as the counters designated by S
2
.
4.
D
of ES/EX/SS/SA/SX series MPU does not support device C.
5.
See the specifications of each model for their range of use.
6.
Flags: M1150 ~ M1333; see remarks of API 53 DHSCS for more details. ES/EX/SS/SA/SX/SC series MPU
does not support M1261 (high speed counter external reset mode designation); see remarks for more details.
7.
The high speed counter inputs counting pulses from the corresponding external input terminals X0 ~ X17 by
inserting an interruption. When the No. of high-speed counter designated in S
2
“+1“ or “-1”, DHSCR will
perform a comparison immediately. When the present value in the high speed counter equals the comparative
value designated in S
1
, the device designated in D will turn Off and even the afterward comparison results are
unequal, the device will still be Off.
8.
If the devices designated in D are Y0 ~ Y17, when the comparative value equals the present value in the high
speed counter, the comparison result will immediately output to the external output terminals Y0 ~ Y17 (and
clear the designated Y output) and the rest of Y devices will be affected by the scan cycle. Devices M and S
act immediately without being affected by the scan cycle.
Program Example 1:
1.
When M0 = On and the present value in the high speed counter C251 changes from 99 to 100 or 101 to 100,
Y10 will be cleared and Off.
2.
When the present value in the high speed counter C251 changes from 199 to 200, the contact of C251 will be
On and make Y0 = On. However, the program scan time will delay the output.
3.
Y10 will immediately reset the status when the counting reaches its target. D is also able to designate high
speed counters of the same No. See Program Example 2.