Communications Protocol
Command – 00 The 00 command controls the Forward, Reverse and Stop mode of the inverter. You must set parameter A002=03 in order for serial communications control of the inverter to apply.
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| The frame format of command 00 follows the | Frame format |
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| timing diagram and specification table. |
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| STX | Node |
| Command | Data | BCC | [CR] | ||||
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| Element | Description |
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| STX | Control code (STart of TeXt) |
| 1 byte |
| STX (0x02) | |||||
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| Node | Node (station) address of inverter | 2 bytes |
| 01 to 32, and FF (broadcast to all | |||||||
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| Command | Transmission command |
| 2 bytes | 00 |
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| Data | Transmission data |
| 1 byte | 00 | = Stop command | |||||
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| 01 | = Forward command | ||||
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| 02 | = Reverse command | ||||
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| BCC | Block check sum code |
| 2 bytes |
| Exclusive OR of Node, | |||||
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| Command, and Data | ||||
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| [CR] | Control code (carriage return) |
| 1 byte |
| [CR] (0x0D) | |||||
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The example below shows a transmission to the inverter at address Node 1 to rotate the motor in the forward direction.
(STX) 01 00 1 (BCC) [CR] | to ASCII | 02 30 31 30 30 31 33 30 0D |
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Command – 01 The 01 command sets the output frequency for the standard profile. You must set parameter A002=03 in order for serial communications control of the inverter to apply.
The frame format of command 01 follows the | Frame format | ||||||||
timing diagram and specification table. |
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STX | Node |
| Command | Data | BCC | [CR] | |||
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Element | Description |
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STX | Control code (STart of TeXt) |
| 1 byte |
| STX (0x02) | ||||
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Node | Node (station) address of inverter | 2 bytes |
| 01 to 32, and FF (broadcast to all | |||||
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Command | Transmission command |
| 2 bytes | 01 |
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Data | Transmission data |
| 6 bytes |
| ASCII code for ten times the | ||||
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| frequency (accommodates two | |||
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| decimal places) | |||
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BCC | Block check sum code |
| 2 bytes |
| Exclusive OR of Node, | ||||
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| Command, and Data | |||
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[CR] | Control code (carriage return) |
| 1 byte |
| [CR] (0x0D) | ||||
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The example below shows a transmission to the inverter at address Node 1 to set the output frequency for 5 Hz. We use a value of 500 in ASCII to represent 5.00 Hz.
(STX) 01 01 000500 (BCC) [CR]
to ASCII | 02 30 31 30 31 30 30 30 35 30 30 30 35 0D |
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