Delta Electronics Programmable Logic Controller DVP-PLC - Manual (Page 281)

6 Application Instructions API 00-49
DVP-PLC Application Manual 6-69
API Mnemonic Operands Function
48 D SQR P Square Root
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 * * *
D *
SQR, SQRP: 5 steps
DSQR, DSQRP: 9 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 : Source device D: Device for storing the result
Explanations:
1. See the specifications of each model for their range of use.
2. Flags: M1020 (zero flag); M1021 (borrow flag); M1067 (instruction operation error)
3. This instruction performs a square root operation on S and stores the result in D.
4. S can only be a positive value. If S is negative, PLC will regard it as an “instruction operation error” and will not
execute this instruction. M1067 and M1068 = On and D1067 records the error code 0E1B (hex).
5. The operation result D should be integer only, and the decimal will be left out. Borrow flag M1021 = On.
6. When the operation result D = 0, zero flag M1020 = On.
Program Example:
When X10 = On, the instruction performs a square root on D0 and stores the result in D12.
X10
SQR D0 D12
D0 D12