9 Diagnostics
9.1 Descriptions of errors
Channel error
Channel errors are discrepancies between the target value
set by a control unit and the actual value of an output chan-
nel. In the event of a short circuit or overload, the output driv-
ers likewise signal a channel error.
Target value
Actual value
Comment
On
On
Ok, no diagnostic message
Off
Off
Ok, no diagnostic message
On
Off
Short circuit/overload
Channel LED: red and switched on
Channel is blocked after troubleshooting
Off
On
Voltage feedback
Channel LED: red and yellow/white and
switched on
Channel is not blocked after troubleshooting
Should a channel error occur, all of the activated
output channels are blocked on the affected con-
nection. Inactivated channels are not blocked.
Blocked channels are deactivated and remain in the "Off"
state until they are reset via the control unit.
A delay time ("Surveillance Timeout") can be configured us
-
ing the "Surveillance Timeout" parameter. Once this period of
time has expired, the output is monitored and error states are
reported as diagnoses. When an output channel is in a static
state (switched permanently on or off), the delay time is 100
ms. A detailed description can be found in Section 7.5 "Pa-
rameter settings".
Sensor short circuit
Pin 1 supplies a monitored 24 V potential for the sensor
power supply to every I/O connection with input functional-
ity.
In the event of a sensor short circuit, a voltage error is re-
ported. Both channel LEDs for the affected connection light
up red.
System/sensor power supply error
ATTENTION
Make sure that the power supply voltage for the system/
sensor power supply does not fall below 18 V DC when
taking the measurement at the furthest-away participant.
The voltage value of the system /sensor power supply is
monitored globally. If the voltage falls below 18 V or exceeds
30 V, an error message is generated and the U
S
LED lights
up red. The error message does not affect the outputs.
Actuator power supply error
The voltage value of the actuator power supply for modules
with output functionality is monitored globally. If the voltage
falls below 18 V or exceeds 30 V, an error message is gener-
ated and the U
L
LED lights up red.
Should an actuator power supply error occur, all
of the activated output channels are blocked. In-
activated channels are not blocked.
Blocked channels are deactivated and remain in the "Off"
state until they are reset via the control unit.
In the event that a channel is blocked, diagnostics
(channel error) will be initiated for every active
output channel once the supply voltage returns to
a normal level.
▶
In order to prevent the diagnostic messages
from being displayed, deactivate all output
channels via the control unit as soon as an
undervoltage is detected.
A fixed delay time of 300 ms is preconfigured from actua
-
tor power supply diagnoses. Once this period of time has
expired, the actuator power supply is monitored and error
states are reported as diagnoses.
9 Diagnostics
| Descriptions of errors
35
2484940000/00/02.2017
Manual UR67-Multiprotocol
