Table of Contents - TG Drives

EXTENDED REGISTER GROUPS
LAN1, LOCAL AREA NETWORK 1
Group Group
No.
LAN1, Local area network 1
Description
LAN1 28 Local area network group. LAN channel number 1.
This group is the interface to the Local Area
Network.
The OSI reference model for LAN communication:
Application layer
Presentation layer
Session layer
Transport layer
Network layer
Datalink layer
Physical layer
LAN1, INTERRUPT HANDLING
There are two types of interrupts that can be generated by the LAN1 group.
1. Net Error When the LAN1 low level protocol (the CAN chip) detects an
error it will go bus off. For this event the system will generate a
PL interrupt and execute the code specified at
LAN1.ErrVector.
This interrupt is always enabled but if a user does not specify
any line where to execute PL code, leaving
LAN1.ErrVector = 0, then the CAN communication line will
only go bus off and no other action will be done by the
firmware. A user can specify what action to take, when an error
occurs in a PL written interrupt routine.
2. Message
Object interrupt
A message object that has either been received or transmitted
can generate an interrupt.
The PL service routine is specified in the
MsgObjLan1.Vector when
the object is defined.
The following must be done before any LAN1 related interrupts
will be generated:
1. A MsgObjLan1.xx must be initialized
and mapped to a priority
level. The MsgObjLan1.Vector member
must have a valid
PL code line # at the time when the SetObjLan1 instruction is
used to program the priority level.
2. The corresponding LAN1.Mask bit for the level used must be
set.
3.
The Vector.Cascade1 member must be set to
LAN1.Handler
4. The Int.SysMask must be set to enable
the
Vector.Cascade1. Before enabling Vector.Cascade1, a
user should clear all bits in LAN1.Pend and the bit for the
Vector.Cascade1 in Int.SysPend, to avoid generating
interrupt on old events.
User's Manual 5.1 Inmotion Technologies AB
Doc. No.9032 0027 01 (B), Rev. 11.07.2001
139