Delta DVP-PLC, Applications Manual

Page: 387 / 586

7 Application Instructions API 50-99
D V P - P L C A P P L I C AT I O N M A N U A L
7-103
API Mnemonic Operands Function
85 VRRD P Volume Read
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
* * * * * * * *
VRRD, VRRDP: 5 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
: No. of VR
D
: Device for storing the volume of VR
Explanations:
1. Range of
S
: 0 ~ 7; without function card: 0 ~ 1.
2. See the specifications of each model for their range of use.
3. Flags: M1178, M1179. See remarks for more details.
4. VRRD instruction is used for reading 2 points (No.0, No.1) of PLC or the VR rotary switch volume change in the 6
points of the function cards (No.2 ~ No.7) and converting the data into values 0 ~ 255 (stored in
D
).
5. If you are to set up the timer by the VR volume, simply rotate the VR to modify the set time in the timer. If you are
to acquire a value larger than 255, multiply
D
by a constant.
Program Example 1:
1. When X0 = On, VR0 volume changed will be converted into an 8-bit BIN value (0 ~ 255) and stored in D0.
2. When X1 = On, the imer T0 will start to time with the content in D0 as the set value in the timer.
X1
TMR T0 D0
X0
VRRD K0 D0
Program Example 2:
1. Read the VR volume in order: The VR0 ~ VR7 rotary switches on the PLC correspond to
S
= K0 ~ K7 of VRRD
instruction. E index register modification is used in the example below, K0E = K0 ~ K7.
2. The timer converts the scale 0 ~ 10 on the rotary switch into 0 ~ 255. The timing unit of T0 ~ T7 is 0.1 second;
therefore, the set time in the timer will be 0 ~ 25.5 seconds.
M1000
RST E
F OR K8
M1000
VRRD
INC E
D100E
NEXT
K 0E