FieldServer FS-8700-03 DF1 Appendix A.2. Checksum, Appendix A.3. Command Support

FS-8700-03 DF1 Driver ManualPage 14 of 16

Appendix A. Driver Notes

Appendix A.1. Continuous Map Descriptors

RS View has been known to crash if it tries to read a Server mapping that is discontinuous.

e.g.	Server map 1:	N21:	0-31
	Server map 2:	N21:	32-100

This will panic the FieldServer and crash RS view as the DF1 will attempt to map N21: 0-100

If set up as:

Server Map 1: N21: 0-100 No problems are experienced

Appendix A.2. Checksum

You can now specify a checksum parameter for the serial connection. The heading keyword is "Checksum" and the possible values are

1) BCC or 2) CRC-16

If nothing is specified it defaults to BCC.

Example:

Connections
Port,	Baud,	Protocol,	Checksum
P1,	9600,	DF1_FD,	CRC-16

The Checksum is valid for both DF1_FD and DF1_HD.

Appendix A.3. Command Support

The following commands are supported by the FieldServer for the various PLC types:

PLC_Type	File_Type		FNC	Read		FNC		Write		Typical
										Command
	N	1		Range Read	0		Range Write		N7: 3, L5
PLC3	F	1		Range Read	0		Range Write		F12: 3, L5
	B	1		Range Read	2		Bit Write			B3/4: 5, l5
	N	1		Range Read	0		Range Write		N7: 3 , L5
PLC5	F	1		Range Read	67		Typed Write		F12: 3, L5
	B	1		Range Read	26		Read Modify Write		B3/4: 5, L5
	N		A2/A1	Protected Typed		AA		Protected Typed		N7: 3, L5
				Logical Read				Logical Write
	F		A2/A1	Protected Typed		AA		Protected Typed		B3/4: 5, L7
				Logical Read				Logical Write
SLC5	B		A2/A1	Protected Typed		AB		Protected Typed		B3/4: 5, L8
				Logical Read				Logical Write
	I		A2/A1	Protected Typed	-		-			I: 13, L5
				Logical Read
	O		A2/A1	Protected Typed	-		-			O: 13, L5
				Logical Read

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