LENZE E94ASSE2454 E94ASSE2454 E94ASSE2454 E94ASSE2454 E94ASSE2454 E94ASSE2454

Connect the cable
Channel not connected (open) • Disable diagnostics
• Connect the channel
Overflow 7H Measuring range exceeded Check the measuring range
The output value set by the user
program exceeds the valid rated
range/overrange
Correct the output value
Underflow 8H Value below measuring range Check the measuring range
The output value set by the user
program is below the valid rated
range/underrange
Correct the output value
Short-circuit to ground 1H Overload at output Eliminate overload
Short-circuit of output QV to MANA Eliminate the short-circuitA diagnostics alarm is output for each diagnostics event and the ERROR LED flashes on the
digital on-board I/O. You can read out the diagnostics alarms, for example, in the diagnostics
buffer of the CPU. You can evaluate the error codes with the user program.he digital on-board I/O cannot trigger an
interrupt because the previous interrupt
was not acknowledged; possibly a configuration
error
• Change the interrupt processing in the
CPU and reconfigure the digital onboard
I/O.
• The error persists until new parameters
are set for the digital on-board I/OTime sequence of the A and B signals
of the incremental encoder do not
meet certain requirements
• Possible causes:
– Signal frequency too high
– Encoder is defective
– Process wiring is incorrectThe compact CPU can generate a hardware interrupt for the following events:
● Rising edge
● Falling edge
You will find detailed information on the event in the hardware interrupt organization block
with the "RALRM" (read additional interrupt information) instruction and in the STEP 7 online
help.
The start information of the organization block includes information on which channel
triggered the hardware interrupt. The figure below shows the assignment to the bits of
double word 8 in local data.When the internal gate is opened, the technology function triggers
a hardware interrupt in the CPU.
Closing of the internal gate (gate stop) 2 When the internal gate is closed, the technology function triggers a
hardware interrupt in the CPU.
Overflow (high counting limit violated) 3 When the count value exceeds the high counting limit, the technology
function triggers a hardware interrupt in the CPU.
Underflow (low counting limit violated) 4 When the count value falls below the low counting limit, the technology
function triggers a hardware interrupt in the CPU.
Comparison event for DQ0 occurred 5 When a comparison event for DQ0 occurs due to the selected
comparison condition, the technology function triggers a hardware
interrupt in the CPU.
When the change of the count value for an incremental or pulse
encoder was not caused by a count pulse, the technology function
does not trigger a hardware interrupt.
Comparison event for DQ1 occurred 6 When a comparison event for DQ1 occurs due to the selected
comparison condition, the technology function triggers a hardware
interrupt in the CPU.
When the change of the count value for an incremental or pulse
encoder was not caused by a count pulse, the technology function
does not trigger a hardware interrupt.
Zero crossing 7 At a zero crossing of the counter or position value, the technology
function triggers a hardware interrupt in the CPU.