Delta DVP-PLC, Applications Manual

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8 Application Instructions API 100-149
DVP-PLC Application Manual 8-22
API Mnemonic Operands Function
109 SWRD P Read Digital Switch
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
D * * * * * * * *
SWRD, SWRDP: 3 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:
D
: Device for storing the read value
Explanations:
1. See the specifications of each model for their range of use.
2. Flags: M1104 ~ M1111 (status of digital switch)
3. This instruction stores the value read from digital switch function card into
D
.
4. The read value is stored in the low byte in D. Every switch has a corresponding bit.
5. When there is no digital function card inserted, the error message C400 (hex) will appear in grammar check.
Program Example:
1. There are l 8 DIP switches on the digital switch function card. After the switches are read by SWRD instruction,
the status of each switch will correspond to M0 ~ M7.
M1000
SWRD K2M0
M0
Y0
M1
MOV K2M0 D0
M2
CNT C0 K10
M3
RST C0
M4
TMR T0 K100
2. The status of M0 ~ M7 can be executed by each contact instruction.
3. The execution of END instruction indicates that the process of input is completed. REF (I/O refresh) instruction
will be invalid.
4. When SWRD instruction uses the data in digital switch function card, it can read minimum 4 bits (K1Y*, K1M*
or K1S*).
Remarks:
When digital switch function card is inserted, the status of the 8 DIP switches will correspond to M1104 ~ M1111.