1. Interval comparison ZCP/ZCPD/ZCPF
1. Interval comparison ZCP/ZCPD/ZCPF
1.1. Instruction Description
Compare the value IN3 with the lower limit IN1 and upper limit IN2, and output the comparison result to OUT and the following two bits.
Assuming IN1=D0, IN2=D2,IN3=D4,OUT=Y000。
| The value of IN1 | the value of IN2 | the value of IN3 | the current comparison result | the output of Y000 | the output of Y001 | the output of Y002 |
|---|---|---|---|---|---|---|
| 100 | 200 | 50 | D4<D0<=D2 | ON | OFF | OFF |
| 100 | 200 | 150 | D0<=D4<=D2 | OFF | ON | OFF |
| 100 | 200 | 250 | D0<=D2<D4 | OFF | OFF | ON |
The lower limit IN1 cannot be greater than the upper limit IN2
1.2. The valid operands of the instruction
1.2.1. Single word type(ZCP):
| Input/Output | Data Type | operand | Description |
|---|---|---|---|
| IN1 | 16 bit integer | D/CV/TV/AI/AO/K/H/V/Z/FD, bit composite word (X/Y/M/C/T/S), local variable (LW) | minimum |
| IN2 | 16 bit integer | D/CV/TV/AI/AO/K/H/V/Z/FD, bit composite word (X/Y/M/C/T/S), local variable (LW) | maximum |
| IN3 | 16 bit integer | D/CV/TV/AI/AO/K/H/V/Z/FD, bit composite word (X/Y/M/C/T/S), local variable (LW) | current value |
| OUT | ON/OFF | Y/M/S, word positioning (D/V/Z) | Result |
1.2.2. Double word type(ZCPD):
| Input/Output | Data Type | operand | Description |
|---|---|---|---|
| IN1 | 32-bit integer | D/CV/K/H/FD, bit composite word (X/Y/M/C/T/S), local variable (LD) | minimum |
| IN2 | 32-bit integer | D/CV/K/H/FD, bit composite word (X/Y/M/C/T/S), local variable (LD) | maximum |
| IN3 | 32-bit integer | D/CV/K/H/FD, bit composite word (X/Y/M/C/T/S), local variable (LD) | current value |
| OUT | ON/OFF | Y/M/S, word positioning (D/V/Z) | Result |
1.2.3. Float type(ZCPF):
| Input/Output | Data Type | operand | Description |
|---|---|---|---|
| IN1 | 32-bit real number | D/K/FD, local variable (LF) | minimum |
| IN2 | 32-bit real number | D/K/FD, local variable (LF) | maximum |
| IN3 | 32-bit real number | D/K/FD, local variable (LF) | current value |
| OUT | ON/OFF | Y/M/S, word positioning (D/V/Z) | Result |
1.3. Example
Command table:
NETWORK 000
LD M0
ZCP K100 K200 D0 Y000 // 当D0 < K100时 Y000 = ON ；当K100 <= D0 <= K200时 Y001 = ON ；当D0 > K200时 Y002 = ON。
图1 ZCP