Racelogic VBOX II Guide de l'utilisateur télécharger pdf (Page 18)

RLVBMIM01 Mini Input Module

18 | 31/07/2009

CAN Operating Modes

The MIM01 can operate in one of three different modes:

 Racelogic Polled CAN Mode

 User Polled CAN Mode

 Timed CAN Mode

Racelogic Polled CAN Mode – Default Mode

This mode should be set if the MIM01 is to be used with a Racelogic VBOX. All the CAN parameters are set to work with the Racelogic VBOX CAN protocol.

In this mode no other parameters need be set or indeed will have any effect.

User Polled CAN Mode

This mode allows a customer‟s own datalogging system to poll the MIM01for data using the CAN bus. In this way, the output timing of the sensor can be

synchronised with other CAN information. The following parameters are all used and so must be set:

 Baud rate (Selectable from 125kbit/s, 250kbit/s, 500kbit/s or 1Mbit/s)

 Extended Identifiers (OFF or ON)

 Request identifiers; Identifiers used to request data from the sensor. Set on the channel page

 Response identifiers; Identifiers used to transmit data from the sensor. Set on the channel page

The timer parameter has no effect in this mode.

Timed CAN Mode

In this mode the MIM01 will send CAN data at intervals determined by the Timer value. The following parameters are all used and so must be set:

 Timer (Time interval in milliseconds between output data)

 Baud rate (Selectable from 125kbit/s, 250kbit/s, 500kbit/s or 1Mbit/s)

 Extended Identifiers (OFF or ON)

 Response identifiers; Identifiers used to transmit data from the sensor. Set on the channel page.

The Request Identifiers have no effect in this mode.

Channels are sent as pairs, so channels 1 and 2 will be sent together, 3 and 4 together and so on. The pairing of channels cannot be changed. The channel

data is sent as 32bit Motorola format floats and thus each channel occupies 4 bytes. The first 4 data bytes contained within a data packet are the lower

channel; the second 4 bytes are for the higher data channel. A CAN Bus DBC file containing default settings for each sensor is available on request from

Racelogic.

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Racelogic VBOX II Guide de l'utilisateur Page 18

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