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Operation
F-FEM-CON — User’s Guide
4.9 CAN Interface
This interface is available only at F-FEM-CON Advanced. It is a galvanically
separate interface CAN 2.0B according to ISO 11898 with a transmission rate up
to 1 Mbps.
4.10 Status Displays
Two vertical rows of LEDs are arranged on the front side of the module. These
indicate the states of the digital inputs and outputs and of the counter inputs.
The connectors (e.g. X19, X20, ...) are combined graphically into groups and
numbered according to the pin assignment table (e.g. for DIGIN, DIGOUT). The
following abbreviations are used.
The unlabeled LEDs display internal status information and are not relevant for
the user.
The LED control is multiplexed. For this reason, LEDs might show fluctuation
effects at certain input frequencies, i.e. they may slowly turn lighter or darker. A
LED may remain dark even for a longer period of time if the input frequency
corresponds exactly to the multiplexing frequency.
The LEDs for the Hall counter input or inductive counter input may be illuminated
even without a sensor being connected. This is caused by the highly resistive
input circuit in connection with the comparator that is behind it and can "wake up"
in any state (1 or 0).
Above the LED rows there is a two-digit seven-segment display, which displays
additional status information.
INC0 Incremental Encoder, zero track
INC1 Incremental encoder, track 1 or track A
INC2 Incremental encoder, track 2 or track B
IND Input state of inductive pick-up
DI1 Digital sensor input, track A
DI2 Digital sensor input, track B
H1 Input state of Hall encoder, track A
H2 Input state of Hall encoder, track B
WD State of Watchdog relay
bright: Relay attracted
dark: Relay fallen
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