3
Analog Input
3.1 General
For analog signals you should use screened cables to reduce interference. The cable
screening should be grounded at both ends. If there are differences in the potential
between the cable ends, there may occur a potential compensating current that could dis-
turb the analog signals. In this case you should ground the cable screening only at one
end.
Depending on the module the following sensors may be connected to the analog input
modules:
n
Current sensor
n
Voltage sensor
n
Resistance-type sensors
n
Temperature sensors
Please take care of the correct polarity when installing the sensors!
Please install short circuits at non-used inputs by connecting the positive
contact with the channel ground of the according channel.
The parameterization via CPU, PROFIBUS and PROFINET happens by means of record
sets (DS). The corresponding record set number may be found at the respective module
description. Here also the indices (IX) respectively subindices (SX) for CANopen respec-
tively EtherCAT are listed.
The modules have diagnostics capability. The following errors can release a diagnostic:
n
Error in parameterization
n
Measuring range over-/underflow
n
Wire break
Alternated blinking of the channel error LEDs
The alternate blinking of the channel error LEDs of channel 0 and 1 indi-
cates a watchdog error due to a system overload. Restart with a power
cycle your system. If the error occurred again, check configuration and
circuit and adjust them if necessary. If the error persists, please contact
our support.
Cables for analog signals
Connecting sensors
Parameterization
Diagnostic functions
VIPA System SLIO
Analog Input
General
HB300 | SM-AIO | | en | 17-05
36