Kv -300 – KEYENCE Visual KV Series User Manual
Page 379
9.4 Programming
KV-10/80 Series Only
KV
-300
KV-10/80
Chapter 9 KV-AD4/DA4 Analog I/O Unit
1-355
1
9
How to calculate digital data when outputting analog current
Digital data = (output current (
µ
A)
÷
resolution (4
µ
A)) - offset value (1000)
Example
When outputting 18 mA
(18000 (µA) ÷ 4 (µA)) - 1000 = 3500
Write "3500" to data memory for D/A conversion.
Next, turn ON the special utility relay for D/A conversion.
Resolution
"Resolution" refers to the minimum analog output value by which digital data can be
changed. For example, 5 mV is the resolution of output range -10 to +10 V. This
indicates that the analog output changes by 5 mV when the value of the digital data
changes by 1.
Digital data content
The KV-DA4 voltage and current output characteristics are as follows.
For example, the digital data for outputting +5 V is 3000.
Digital
data
+1000
+2000
+3000
+4000
+10
-8
-6
-4
-2
0
+2
+4
+6
+8
Range: ±10 V
-10
Voltage
(V)
Voltage output characteristics
Digital
data
+1000
+2000
+3000
+4000
0
2
6
8
10
12
14
16
18
Current
(mA)
20
4
Range: 4 to 20 mA
Current output characteristics
KVHKA Chap 09.p65
08.3.11, 11:20 AM
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