Schneider Electric 890USE17700 manual

Data Exchange

The Output Data The output data process image contains the data written to the island from the

Process Image Modbus over TCP/IP host. This data is used to update the output modules on the island bus. In the sample island bus assembly, there are four output modules—three digital output modules and one analog output module.

Each digital output module uses one Modbus register for its data. The analog output module requires two registers, one for each output channel. Therefore, a total of five registers (registers 40001 through 40005) are needed to accommodate the four output modules in the sample island bus assembly.

register 40001																	STB DDO 3200 data
	15	14		13	12	11	10	9	8	7	6	5		4	3		2	1		0
																					ON/OFF conditions
																					of outputs 1 and 2
																			always 0
register 40002															STB DDO 3410 data
	15	14		13	12	11	10	9	8	7	6	5		4	3		2		1	0
																					ON/OFF conditions
																					of outputs 1 ... 4
																not used; always 0
register 40003															STB DDO 3600 data
	15	14		13	12	11	10	9	8	7	6	5		4	3		2		1	0
																					ON/OFF conditions
																					of outputs 1 ... 6
													always 0
register 40004												STB AVO 1250 channel 1 data
	15	14		13	12	11	10	9	8	7	6	5		4	3		2	1		0
																						ignored
															11-bit analog value (see 1)
			sign bit (see 1)
												STB AVO 1250 channel 2 data
	register 40005
	15	14		13	12	11	10	9	8	7	6	5		4	3		2	1		0
																						ignored
																11-bit analog value (see 2)
			sign bit (see 2)

1The value represented in register 40004 is in the range +10 to -10 V, with 11-bit resolution plus a sign bit in bit 15.

2The value represented in register 40005 is in the range +10 to -10 V, with 11-bit resolution plus a sign bit in bit 15.

The digital modules use the LSBs to hold and display their output data. The analog module uses the MSBs to hold and display its output data.

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