Delta DVP-PM Series - Page 170

5 Categories and Use of Basic Application Instructions
DVP-PM Application Manual 5-33
API Mnemonic Operands Function
17 D XCH P
Exchange
Controllers
20PM 10PM
Bit Devices Word devices Program Steps
Type
OP
X Y M S K H KnX KnY KnM KnS T C D E F
D
1
* * * * * ***
D
2
* * * * * ***
XCH, XCHP: 5 steps
DXCH, DXCHP: 9 steps
Operands:
D
1
: Device to be exchanged 1 D
2
: Device to be exchanged 2
Explanations:
1. The contents in the devices designated by D
1
and D
2
will exchange
2. It is better to apply a pulse execution for this instruction (XCHP).
3. When XCH is used as 16-bit instruction, Z device cannot be adopted; when XCH is used as 32-bit instruction,
V device cannot be adopted.
4. When specifying the bit device of KnX(Y/M/S), the starting No. should be a multiple of 16 in octal or decimal
format. For example, K1X0, K4Y20 (octal); K1M0, K4S16 (decimal).
Program example:
When X0=OFF→ON, the contents of D20 and D40 exchange with each other.
X0
D40XCHP D20
Before
execution
After
execution
120
12040
40
D20
D40
D20
D40
Points to note:
1. As a 16-bit instruction, when the devices designated by D
1
and D
2
are the same and M1303 = ON, the upper
and lower 8 bits of the designated devices exchange with each other.
2. As a 32-bit instruction, when the devices designated by D
1
and D
2
are the same and M1303 = ON, the upper
and lower 16 bits in the designated device exchange with each other.
3. When X0 = ON and M1303 = ON, 16-bit contents in D100 and those in D101 will exchange with each other.
X0
M1303
9
20
20
9
D100L
D100H
8
40
40
8
D101L
D101H
D100L
D100H
D101L
D101H
DXCHP D100 D100
Before
execution
After
execution