CoE (= CAN over Ethernet)
Description of the data transfer method
Using this method, it is possible to transfer the values of analogue and digital C.M.I. inputs to other C.M.I.s via Ethernet (LAN).
This means data can be exchanged between separate CAN networks.
Data transfer using Ethernet takes place via UDP, port 5441.
Example:
The receiving C.M.I. must have a fixed IP address. We recommend firstly installing the C.M.I. with DHCP and then deactivating DHCP mode in the Settings/Ethernet menu.
If data is transmitted in both directions, both C.M.I.s must have a fixed IP address.
Example: a C.M.I. input is transferred to the C.M.I. via the LAN with IP address 192.168.10.253, and there it is transferred from the C.M.I. into the CAN network as CAN output 1 via CAN node 25.
1. Output designation
2. Select the input type: CAN bus, Modbus, Data link or SMS.
3. Select the required input
4. Transfer the measured value (currently no other entry possible)
5. Enter the IP address of the receiving C.M.I. to which the value is transmitted
6. Enter the CAN node number: the receiving C.M.I. also receives this virtual node number itself. This virtual node number must not already be assigned in the CAN network of the receiving C.M.I. This also applies to the receiving C.M.I. itself. Several virtual node numbers may be assigned for one C.M.I.
7. The transferred value receives this number for the CAN network output. Up to 32 analogue values and 32 digital values can be issued for each virtual node.
8. Transmission conditions: the input value is transferred to the LAN as a current value under the following conditions.
Transmission conditions for analogue CoE outputs:
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If change > 3
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If the current value has changed by more than 3 compared to the last transmitted value, a new transmission is made.
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Blocking time 10
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If the value changes by more than 1 within 10 seconds of the last transmission, the value is still only retransmitted after 10 seconds (minimum value: 1 second).
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Interval time 5
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The value is transmitted every 5 minutes even if it has not changed by more than 3 since the last transmission (minimum value: 1 minute).
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Transmission conditions for digital CoE outputs:
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If change yes/no
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Transmission of the value if a status change occurs
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Blocking time 10
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If the value changes within 10 seconds of the last transmission, the value is still only retransmitted after 10 seconds (minimum value: 1 second).
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Interval time 5
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The value is transmitted every 5 minutes even if it has not changed since the last transmission (minimum value: 1 minute).
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9. Current value: this value is currently being issued to the LAN from the C.M.I.
10. After completing the entry: Save
