IFM Electronic CR0403 - Page 38

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ifm Programming Manual ecomatmobile BasicController (CR0403) Runtime System V03.02 2015-04-01
System description Software description
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Limitations for CAN in this device
17975
FIFO (First In, First Out) = Operating principle of the stack memory: The data packet that was
written into the stack memory first, will also be read first. Each identifier has such a buffer (queue).
Some Raw-CAN function elements enable transmitting and receiving of several messages in one PLC
cycle as the messages are temporarily stored in a FiFo:
- CAN_TX..., → Function elements: transmit RAW-CAN data
- CAN_RX_ENH_FIFO (→ page 76)
- CAN_RX_RANGE_FIFO (→ page 80)
The number of FIFo messages is limited. The following limitations of the devices are valid:
Device
BasicController: CR040n,
CR041n, CR043n
BasicDisplay: CR045n
SmartController: CR253n
PDM360 NG: CR108n
Criterion
max. FiFo transmit
- with FB CAN_TX...
- with FB CAN_TX_ENH...
4 messages
16 messages
4 messages
16 messages
max. FiFo receive
- with FB CAN_RX_..._FIFO 32 messages 32 messages
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Limitations for CANopen in this device
17976
The following limitations of the devices are valid:
Device
BasicController: CR040n,
CR041n, CR043n
BasicDisplay: CR045n
SmartController: CR253n
PDM360 NG: CR108n
Criterion
max. guarding error 32 messages 128 messages
max. SDO data 2 048 bytes 2 048 bytes
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Limitations for CAN J1939 in this device
17977
The following limitations of the devices are valid:
Device
BasicController: CR040n,
CR041n, CR043n
BasicDisplay: CR045n
SmartController: CR253n
PDM360 NG: CR108n
Criterion
max. FiFo transmit
- with FB J1939_TX
- with FB J1939_TX_ENH
4 messages
16 messages
4 messages
16 messages
max. FiFo receive
- with FB J1939_RX_FIFO 32 messages 32 messages
max. DTCs 64 messages 64 messages
max. data J1939 1 785 bytes 1 785 bytes
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