Spd: Pulse Detection Instruction - INVT IVC2H Programming Manual

Programming manual of IVC series small PLC
1. In the first user-program scan cycle, assign elements D100~D115 with values to generate the table for comparison.
2. When M0 and X6 are both ON, C244 will count when X0 changes from OFF to ON (for the input frequency, see 错误！未找
到引用源。错误！未找到引用源。 ). When C244 changes from 999 to 1000, the C244 contact will be set; when C244 changes
from 1001 to 1000, the C244 contact will be reset. When the C244 contact drives Y10, the execution of Y10 will be determined
by the user program scan cycle.
3. When M1 is ON, and the DHSP instruction meets the requirements in the preceding "Note", the compare will start with the
first record. The compare with the second record will not start until the first compare is over and the output data has been
output to SD180&SD181. After the compare with the last record is over, the compare with the first record will start again, and
SM185 will be set. SD184 is the SN of the present record, and SD182&SD183 are the present data for comparison. The output
data will be output to SD180&SD181 immediately, regardless of the scan cycle. If you want to stop the at the last record, set the
output data of the last record to 0.
4. When M2 is ON, and SM244 is ON, C244 will count down. When M2 is OFF, and SM244 is OFF, C244 will count up.
5. When X6 is OFF, C244 is invalid.
6. When M0 and X6 are both ON, if X2 is ON, C244 will be cleared, and the C244 contact will be reset.

6.10.9 SPD: Pulse detection instruction

LAD:
IL: SPD (S1) (S2) (D)
Operand Type
S1 BOOL
S2 WORD Constant
D WORD
Operand description
S1: input point. Range: X0~X5.
Applicable elements
X
KnX KnY KnM KnS KnLM KnSM
Chapter 6 Application instructions
LD SM1
DMOV 100 D100
MOV 0 D102
MOV 1 D103
DMOV 200 D104
MOV 0 D106
MOV 2 D107
DMOV 300 D108
MOV 0 D110
MOV 3 D111
DMOV 100 D112
MOV 0 D114
MOV 4 D115
LD M0
HCNT C244 1000
LD M1
DHSP D100 4 C244
LD M2
OUT SM244
LD C244
OUT Y10
LD M3
PLSY SD180 0 Y0
Applicable to IVC1 IVC1S IVC1L IVC2L IVC2H
Influenced flag bit
Program steps 7
D SD C T
D
S2: time unit for input point detection. Unit: ms. Operand
S2>0.
148
Indexed
addressing
V Z R √
V R √