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6F3A4768
3.8.2.2 Measurement Analog Output
Five channels, D/A1 to D/A5, are provided as measurement analog outputs, and these are outputs from the
CTR board (ARND-3110). The configuration is shown below. Output data, gain and offset can be set on the PC
screen.
D/A1
$DA1_AS
$DA1_GS
$DA1_OS
D/A2
$DA2_AS
$DA2_GS
$DA2_OS
D/A3
$DA3_AS
$DA3_GS
$DA3_OS
D/A4
$DA4_AS
$DA4_GS
$DA4_OS
D/A5
$DA5_AS
$DA5_GS
$DA5_OS
0 V
D/A1 D/A2
D/A3
D/A4 D/A5
Data output
Gain
Offset
Fig. 3.8.5 Measurement Analog Output Configuration
[Setting examples]
<Example 1> Speed feedback (SP_F) is output from D/A1.
The settings are made so that SP_F in a range of 0 to 125% (0 to 31250 counts) is output at 0 to
+
10 V. These
settings are made using the personal computer (maintenance tool).
$DA1_AS = SP_F
$DA1_GS = 31250 (125%)
$DA1_OS = 0 (0%)
<Example 2> Torque reference (T_R) is output from D/A2.
The settings are made so that T_R in a range of 50 to 125% (2000 to 5000 counts) is output at 0 to
+
10 V.
$OA2_AS = T_R
$OA2_GS = (5000
−
2000) = 3000 (75%)
$DA2_OS = 2000 (50%)
Analog output data names are normally protected. When they are protected, data names cannot be changed. To
release the protection, set bits 0 to 4 (corresponds to DA1 to 5) of $DA_AS_PRTOFF to 1. Analog output
settings can be changed anytime but be careful when you change the setting because if the output is used
outside when it is changed, it may cause disturbances.
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