Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 301)

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 7-17
API Mnemonic Operands Function
55 D HSZ High Speed Zone Compare
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
* * * * * * * * * *
S *
D * * *
DHSZ: 17 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
: Lower bound of the comparison zone S
2
: Upper bound of the comparison zone S: No. of high speed
counter D: Comparison result
Explanations:
1. S
1
has to be euqal to or smaller than S
2
. (S
1
≤ S
2
)
2. When S
1
> S
2
, the instruction will perform a comparison by using S
1
as the upper bound and S
2
as the lower
bound.
3. S has to designate high speed counters C235 ~ C255, See remarks of API 53 DHSCS for more details.
4. D will occupy 3 consecutive devices.
5. Flags: M1150 ~ M1333; see remarks of API 53 DHSCS for more details. M1150, M1151 DHSZ executing
multiple points comparison mode; see Program Example 3 for more details; SA/SX/SC series MPU does not
support. M1152, M1153 DHSZ as frequency control mode; see Program Example 4 for more details; SA/SX/SC
series MPU does not support.
6. The output will not be affected by the scan time.
7. The zone comparisons and outputs are all processed by inserting interruptions.
Program Example 1:
1. Designate device Y0 and Y0 ~ Y2 will be automatically occupied.
2. When DHSZ instruction is being executed and the counting of the high speed counter C246 reaches upper and
lower bounds, one of Y0 ~ Y2 will be On
M1000
DCNT C246 K20000
DHSZ K1500 K2000 C246
Y0
Y0
Y1
Y2
When the present value in C246 < K1,500, Y0 = On
When K1,500 < present value in C246 < K2,000, Y1 = On
When the present value in C246 > K2,000, Y2 = On