To use Manual CAN Commands functionality, the user can select any of listed available CAN protocols in CAN I/O tab apart from "None". Afterwards, Manual CAN Commands functionality can be found at the bottom of Manual CAN Settings tab in configurator.
NOTE!
Manual CAN Commands can be tested on FW 55.00.09.rev.08 or newer
Manual CAN Commands functionality allows user to send configurable commands in CAN network. Up to 10 Manual CAN Commands could be configured by setting parameters using SMS/GPRS commands or in configurator at the bottom of Manual CAN Settings tab.
The main benefit, of using Manual CAN Commands functionality is that the user is able to control the transport via CAN BUS without requiring additional specific commands implementation from the device's firmware side to perform certain action. To use this functionality, the user must have:
TFT100 device with CAN interface;
55.00.09.Rev.08 or newer firmware;
Transport with CAN interface;
Transport's CAN communication protocol (with information about frames, parameters, ID's, baud rate and commands).
Manual CAN Commands Settings
User can configure up to 10 Manual CAN Commands by setting CAN Type, CAN ID, Data, Data length, Send Type, Send Period, Send Count parameters.
CAN Type - Enables command and selects CAN ID Type which will be used in command.
CAN ID - Defines command CAN ID.
Data - Defines command data.
Data length - Defines command data length in bytes.
Send Type - Selects command send type: - If Once is selected - command will be send one time after it is triggered. - If Periodic is selected - command will be send periodically after it is triggered. - If Response is selected - command will be send once as response to received manual can message.
Send Period - Defines command send period in ms if Periodic send type is selected.
Response - Defines Manual CAN message which will trigger command.
Send Count - Defines command sending count if Periodic send type is selected: - If set to 0 - command will be send infinitely until it is turned off by user.
Parameter Id
Name
Value
Description
Min
Max
Default
16000 + 10 * Command number
CAN Type
0 - Disabled
2 - Extended
0 - Disabled
0 - Disabled
1 - Standard
2 - Extended
16001 + 10 * Command number
CAN ID
00000000
FFFFFFFF
FFFFFFFF
CAN ID Range
16002 + 10 * Command number
Data
0000000000000000
FFFFFFFFFFFFFFFF
FFFFFFFFFFFFFFFF
CAN Data Range
16003 + 10 * Command number
Data length
0
8
0
Length Bytes
16004 + 10 * Command number
Send Type
0 - Once
2 - Response
0 - Once
0 - Once
1 - Periodic
2 - Response
16005 + 10 * Command number
Send Period
0
2147483640
0
Period ms
16006 + 10 * Command number
Response
0
29
0
Manual CAN No.
16007 + 10 * Command number
Send Count
0
1000
0
Send Count
Important note!
Send Period details
If only CAN commands are being used:
Each command period increases approximately by 50 ms.
Enabling all messages with the same period adds delay of 500-550 ms Example: 100 ms Period selected for all commands - each command sending could take up to 550 ms.
If CAN Commands will be used together with CAN data reading:
CAN DATA reading increase CAN commands period approximately by 50 ms. Example: One command configured with 200 ms period - command sending could take up to 250 ms.
Using all CAN commands period increase approximately by 150 ms.
CAN Commands will be used together with frequent (less than 5 seconds) records saving/sending:
One command period increases approximately by 100 ms.
If all are commands used - period increases approximately by 200 ms.
CAN Commands will be used together with CAN reading and frequent (less than 5 seconds) records saving/sending:
Using one command increases period by approximately 250 ms Example: One command configured with 50 ms period could have delay up to 300 ms.
Enabling all commands could drastically increase delay - sending could take up to 1.5 s (All commands configured with 100 ms period).
We strongly advise:
If all commands are necessary with certain period - keep all commands with same sending period.
If one particular command (ex. Heartbeat) is necessary to be sent with specific period - increase particular command period and increase other commands period as high as possible.
For example: Heartbeat 50 ms, all other commands 1000 ms. That will give particular command priority, but other commands will be sent with a bigger delay than configured.
Do not leave any enabled CAN reading parameters if CAN reading is not used.
Keep Data Acquisition settings with higher than 15 seconds.
NOTE!
Send Period details Records could drastically increase CAN command sending period as records could be generated every second by configured Features records, Data Acquisition settings or IO elements operands. Each particular case has different affect for CAN Command delay, that depends on configuration and in case of issue should be investigated individually.
SMS/GPRS Commands for Manual CAN Commands functionality
mcan_cmd:<Command No.> - Used to trigger Manual CAN Command.
mcan_stop:<Command No.> - Used to turn off periodic Manual CAN Command.
Examples
Example on how to configure Manual CAN Commands functionality can be found in here.
