HMS Anybus Communicator CAN PROFINET IRT 2.32 User Manual page 13

Description
2.4.4 Control and Status Words
The optional Control and Status Words can be used to control the startup mode of the Anybus
Communicator CAN and to read the status of the CAN subnetwork. The Control Word is always
mapped to the first two bytes of the output data area, and the Status Word to the first two bytes
of the input data area, with the Least Significant Byte in the first byte (byte 0).
Fig. 6 Memory buffers
The illustration shows the maximum available data areas in Anybus Communicator CAN. The actual
amount of memory that can be allocated depends on the fieldbus network used.
Control Word
The Control Word can be used to reset the CAN controller and to select the startup mode and/or
reboot the Anybus Communicator CAN.
Bit Name
15 - 3 (reserved)
2 Reset CAN
1 Reboot module
0 Operation mode
Status Word
The Status Word holds information from the CAN subnetwork.
Bit Name
15 - 6
(reserved)
5 CAN overrun
4 Error passive
3
Bus off
2 Reset CAN
complete
1
(reserved)
0
Operation mode
Anybus ® Communicator ™ CAN PROFINET
Description
1 - Resets the CAN controller (used when CAN interface is bus off)
1 - Reboots the Anybus Communicator CAN (software reset)
Sets the start-up operation mode of the Anybus Communicator CAN:
0 - Idle (no new data is issued to the CAN subnetwork. Data received from the CAN
subnetwork is sent on to the higher level network.)
1 - Run (data is exchanged between CAN subnetwork and higher level network.)
Description
0 - OK
1 - CAN reception overrun
0 - CAN interface is NOT in error passive state
1 - CAN interface is in error passive state
0 - Bus runnning
1 - Bus off
If set, the CAN controller has been reset (used when CAN interface is bus off)
0 - Idle
1 - Run
® IRT (2.32) User Manual
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SCM-1202-035 1.2 en-US