Lenze EMZ9374IB - Manual (Page 57)

Commissioning
Initial switch−on
7
l
57 EDBMZ9374X DE/EN/FR 4.2
7 Commissioning
7.1 Initial switch−on
Before commissioning the system bus must be completely wired.
(
Stop!
Prior to switching on the power supply check
ƒ the entire wiring for completeness and short−circuit,
ƒ whether the bus system is terminated at the physically first and
last bus device.
7.2 Initial switch−on
ƒ For the communication between controller (master) and terminal
extension (slave), the codes must be set at the controller, if necessary.
ƒ Parameterize the codes using the operating instructions of the controller.
Monitoring of communication errors (signal line interrupt)
(
Stop!
When the system bus is operated with event−triggered process data
transfer (Lenze default setting) monitoring is not possible. If a
communication error has occurred, the digital outputs of the
terminal extensions change to LOW level in an undefined way. The
state which was output last, is maintained at the outputs.
When the system bus is operated with cyclic process data transfer you can set a
monitoring time. If a communication error has occurred and the monitoring time
has elapsed, the digital outputs change to LOW level and an error message is
output.
ƒ Set the cyclic process data transfer for the system bus at the controller.
ƒ Setting the system bus monitoring time at the terminal extensions:
(
¶ 64)
Monitoring with BUS−OFF (short−circuit of the signal line)
A BUS−OFF is always monitored. The digital outputs of the terminal extensions
switch to LOW level.