VBA-2A-KE5-IL/UL, VBA-4A-KE5-IJL/UJL
Appendix A
2
0
1
8
-0
7
19
7
Appendix A
7.1
Value Ranges of the Analog Output Modules
Value Ranges for Current Outputs
Current: 0 mA ... 20 mA
Value Ranges for Voltage Outputs
Voltage: 0 V
10 V
7.2
Delay Times
When working with the analog output module, the AS-Interface requires a certain amount of
time in which to transmit and convert the digital signals to the analog outputs. The conversion
time and rise time in the module, and the transmission time in the AS-Interface network depend
on a number of different factors.
Latency
Latency = the transit time of the signal in worst-case conditions.
In the worst-case scenario, the transfer of a channel via the AS-Interface network begins
shortly before the AS-Interface master has received a new data image.
Latency = conversion time + rise time + transfer time * (number of ch1)
Conversion Time
The conversion time is the time required by the module to convert a digital value into an analog
signal. The conversion time is 0.7 ms.
Data sent by master
Output signal [mA]
Output LED
> 23000
23
Above threshold
(peripheral fault)
1)
20001
23000
20.001 ... 23
on
Extended range
2)
0 ... 20000
0 ... 20
on
Nominal range
< 0
0
Below threshold
(peripheral fault)
1)
Table 7.1
Value range 0 mA
23 mA
1)
: Peripheral fault (P fault) messages can be managed via parameter P2. The output LED
always flashes in the event that the value is above or below the relevant threshold. .
2)
: Accuracy corresponds to the nominal range
Data sent by master
Output signal [V]
Output LED
> 11000
11.0
Above threshold
(peripheral fault)
1)
10001 ... 11000
10.001 ... 11.0
Extended range
2)
0 ... 10000
0 ... 10
Nominal range
< 0
0
Below threshold
(peripheral fault)
1)
Table 7.2
Value range 0 V
11 V
1)
: Peripheral fault (P fault) messages can be managed via parameter P2. The output LED
always flashes in the event that the value is above or below the relevant threshold. .
2)
: Accuracy corresponds to the nominal range
