Table of Contents - TG Drives

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LAN1, Local area network 1
EXTENDED REGISTER GROUPS
A user controls how to handle ’Remote Frame’ responses on transmit descriptors.
See MsgObjLAN1.Status and MsgObjLAN1.Frame.
LAN1, POWER UP
On power up the low-level protocol initializes itself and sets up CAN
communications rate at the content of EEprom.8.
A user can change the can frequency. See LAN1.Ini.
LAN1, HIGH LEVEL COMMUNICATION PROTOCOLS.
No higher-level communication protocols are implemented that require their own
groups.
A higher protocol uses some user defined ”live” message objects and the
underlying protocol uses these to implement communication services, as:
• On-demand data, (server/client relation ship).
• Broadcast data.
• Sporadic data.
• Periodic data.
• Data synchronization.
• Large data messages, up/download of application code.
• User defined services. (User defined protocol).
• Multi data services, uses a communication area, when more that one
parameter is required before a service can be performed.
LAN1 COMMUNICATION SCENARIOS.
Server uses periodic receive objects to trigger the slave owning the object to
transmit its data. A slave transmits data on demand from the server.
Server
Client # 1
Client # 2
Client # 3
Node # 1
Node # 2
Node # 3
Node # 4
All nodes use periodic receives objects to trigger the owner of the object to transmit
its data. Any node can send or receive sporadic ’alert’ message objects.
i
All message objects must have a unique object ID. Make sure
that each and every node/server use unique transmits object
IDs. In other words, there cannot be more than one unit that
transmit an object with the same ID, at the same time.
Sporadic message objects have the disadvantage that the
user must be sure that these messages will not clogging the
network. And the firmware cannot handle back-to-back
messages. The time between two messages sent back-to-back
User's Manual 5.1 Inmotion Technologies AB
Doc. No.9032 0027 01 (B), Rev. 11.07.2001