Apex Digital 5708009-C manual DeviceNet Poll Command Message, DeviceNet Response Message

Apex 1 to 5.5 kW Generator

DeviceNet is connected through pins 1, 10, 13, 14, and 15 of the User port (See table 4-1).

When the generator powers up, it defaults to user control mode. However, engaging DeviceNet automatically places the generator in host control mode. Note that when the generator is in host control mode, the regulation mode is forward power.

Before operating your Apex generator through the DeviceNet port, ensure that your network is connected to the DeviceNet port and the User port. Also, ensure that you have selected an appropriate MAC ID and baud rate. Finally, ensure that you have read the following information about command and response messages and the DeviceNet LEDs.

DeviceNet Poll Command Message

Note that this device uses DeviceNet’s Group 2 I/O Poll Command message (and the associated Group 1 I/O Poll Response message) to transfer low-level I/O data between the device (slave) and the master. Table 4-16 represents the structure of the poll command message.

Table 4-16.Poll Command Message

Byte	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
0			Power Output Setpoint AI (LSB)
1	0	0	0	0	Power Output Setpoint AI
						(MSB)
2	0	0	0	0	0	0	0	0
3	0	0	0	0	0	0	0	0
4								PO

Power Output Setpoint 0 to 10 V; 10 V = full output power of the power supply

PO = Power On

1 = turns power supply’s output ON

0 = turns power supply OFF

Note: The 16-bit AI should be shifted right four bits and the remaining first four bits should be filled with 0s. This changes the 16-bit AI to a 12-bit AI with a value of 10 V = OFFFhex.

Note: Power Output Setpoint values exceeding OFFFhex are limited to OFFFhex.

DeviceNet Response Message

Table 4-17 represents the structure of the response message.

5708009-C 4-77