Command/reference switching
Channels
A channel is the name given to the source of a command or reference.
The six Altivar 61 channels are:
•The terminals
•The graphic display terminal
•The integrated Modbus ports
•The integrated CANopen port
•A network card
•The "Controller Inside" card
The Altivar 61 has two integrated Modbus ports. These two ports are physically independent of one another but together constitute a single logic channel.
The drive does not distinguish between commands and references that come from the Modbus network port and those that come from the Modbus HMI port.
With the Altivar 61 drive, it is possible to select the active command channel and the active reference channel:
•Via configuration
•Via switching at the terminals or via a communication network
Channel commands and references
All the drive’s command and reference parameters are managed on a
Only the control word (CMd), speed reference (LFrd) and frequency reference (LFr) are switched.
It is possible to identify the last value written for each channel and each command or reference parameter:
Parameter name |
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| Parameter code |
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| Taken into |
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| Communication | Controller Inside |
| account by the | Modbus | CANopen | ||
| card |
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| drive |
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Control word | CMd | CMd1 | CMd2 | CMd3 | CMd4 |
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Extended control word | CMI | CMI1 | CMI2 | CMI3 | CMI4 |
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Speed reference (rpm) | LFrd | LFd1 | LFd2 | LFd3 | LFd4 |
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Frequency reference (0.1 Hz) | LFr | LFr1 | LFr2 | LFr3 | LFr4 |
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PID regulator reference | PISP | PIr1 | PIr2 | PIr3 | PIr4 |
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Analog multiplier reference | MFr | MFr1 | MFr2 | MFr3 | MFr4 |
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