Instruction manual

Fieldbus Interface
105
Programming Information
The Fieldbus Interface card allows a PLC host to control the MICRO 4000 NET controller. The
controller is configured by parameters described on page 17. Some of these parameters may be
written by the host to change the system configuration or mode of operation, and all of the
parameters may be read by the host to monitor the system status (Note: This feature is limited in
this version of software due to program memory constraints).
Fieldbus terminology:
Fieldbus Master The unit that controls the fieldbus network, typically a PLC or host computer.
This controller sets the fieldbus addresses and determines how the slaves
transmit information. There can only be one fieldbus master per network.
Fieldbus Slave The unit that receives commands over the fieldbus network from the master.
This unit responds to commands when requested by the master. There may
be more than one fieldbus slave per network.
Data Direction Output Array: Data packet sent from Fieldbus Master (host) to Fieldbus Slave
(MICRO 4000 NET).
Input Array: Data packet sent from Fieldbus Slave to Fieldbus Master.
The format of the data packets is described on the following pages.
Important: For proper operation of the Fieldbus Interface the MICRO 4000 NET controller must
be configured for momentary inputs. Set parameter 27 (Power-Up Mode) to any value except 4.
Refer to page 17 for more information about setting controller parameters.
Important: The configuration of the Operating Mode Command and Status bits depends on the
setting of parameter 51 (Switchpad Type). Refer to page 17 for more information about setting
controller parameters.
Note: In all tables, x indicates don’t care or not used.