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Delta DVP-PLC User Manual

Delta DVP-PLC
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6 Application Instructions API 00-49
DVP-PLC Application Manual
6-55
API Mnemonic Operands Function
38
SFWR P
Shift Register Write
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 * * * * * *
n * *
SFWR, SFWRP: 7 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: Device of stack data written in D: Start No. of stack data n: Length of stack data
Explanations:
1. Range of n: 2 ~ 512
2. See the specifications of each model for their range of use.
3. Flag: M1022 (carry flag)
4. The stack data of n words starting from D are defined as “first-in, first-out” stack data and designate the first
device as the pointer. When the instruction is executed, the content in the pointer pluses 1, and the content in
the device designated by S will be written into the designated location in the “first-in, first-out” stack data
designated by the pointer. When the content in the pointer exceeds n - 1, this instruction will not process any
new value written in and the carry flag M1022 = On.
5. This instruction adopts pulse execution instructions (SFWRP)
Program Example:
1. Pointer D0 is reset as 0. When X0 = OffOn, the content in D20 will be sent to D1 and the content in pointer D0
becomes 1. After the content in D20 is changed, make X0 = OffOn again, and the content in D2 will be sent to
D2 and the content in D0 becomes 2.
2. The figure below illustrates the shift and writing in 1~2 execution of the instruction.
n The content in D20 is sent to D1.
o The content in pointer D0 becomes 1.
X10
RST
D0
D9 D8
D7
D6 D5
D4
D3
D2
D1
D0
D20
X0
SFWRP
D20
K10
D0
pointer
n = 10 points
D0 = 3 2 1
Reset the content of D0 as 0 in advance
Remarks:
This instruction can be used together with API 39 SFRD for the reading/writing of “first-in, first-out” stack data.

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Delta DVP-PLC Specifications

General IconGeneral
ManufacturerDelta Electronics
ModelDVP-PLC
CategoryController
Humidity5% to 95% RH, non-condensing
Programming LanguageLadder Diagram (LD), Instruction List (IL), Sequential Function Chart (SFC)
CPU TypeVarious, depending on the specific model within the DVP series (e.g., ES2, EX2, SX2, SA2, EH3, etc.)
Operating TemperatureTypically 0°C to 55°C (32°F to 131°F)
Storage TemperatureTypically -25°C to 70°C (-13°F to 158°F)

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