Rockwell Automation AutoMax ControlNet Communication Interface Module - Manual (Page 60)

Page 60 AutoMax ControlNet Module
Publication number DSMBCN-UM001B-EN-P February 2003
State Registers
The MBCN maintains several registers that indicate the state of various
operations on the MBCN.
Module State
The Module State register (9472) indicates the current overall state of the
MBCN. It can have one of three values.
Name Value Description
CRD_STE_OFFLINE 41h MBCN is offline and not trying
to attach to the network
CRD_STE_ONLINE 42h MBCN is trying to attach to the
network
CRD_STE_ERROR E1h Fatal error
Figure 19 Module State Table
NAM State
The Network Attachment Monitor (NAM) allows nodes to
non-disruptively join a working network. Refer to section 9.9 of the
ControlNet Specification for detailed information on the Network
Attachment Monitor.
The NAMState register (9473) indicates the current Network Attachment
Monitor state. If the NAM state is not
NAM_ATTACHED ,
the 7-segment
LED displays “1”. The following table lists possible NAM states.
Name Value Meaning
NAM_GO_OFFLINE 00h Transitional state in going
offline
NAM_BAD 01h Duplicate node or address >
UMAX
NAM_WAIT_FOR_OFFLINE 02h Transitional state in going
online
NAM_GO_ONLINE 03h Transitional state in going
online
NAM_CHK_FOR_CABLE 04h Transitional state in going
online
NAM_WAIT_TO_ROGUE 05h Transitional state in going
online
NAM_WAIT_FOR_ONLINE 06h Transitional state in going
online