FieldServer FS-8700-66 instruction manual Appendix C.2. Scaling

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Appendix C.2. Scaling

Scaling was added in version 1.02a and is not supported for earlier versions.

Scaling is applied by the driver when bytes and registers are stored.

When bit data is transferred in bit format than scaling is not applied. When bit data is transferred using bye format’s then scaling may be applied.

Scaling is applied using the FieldServer’s standard Map Descriptor parameters.

Data_Array_Low_Scale,

Data_Array_High_Scale,

Device_Low_Scale,

Device_High_Scale

Appendix C.3. Server Response NAK, Major and Minor Error Codes

From version 1.02c the when the Server responds with a MailBox Nak it now allocates different Major and Minor error codes to differentiate the NAK reasons.

0x05 0xbe	No Such Node	The request Node is not known by the Server.
0x05 0xbd	No Data	The Data age is greater than the CACHE_AGE setting.
0x05 0xbc	Other Problems	Eg. No Server MD’s defined for requested data.

Major Error Status Codes

Error Status		Description
01h	Illegal Service Request:	Either not defined or not supported.
02h	Insufficient Privilege:	Minor status field contains the privilege level required
		for the service request
04h	Protocol Sequence Error:	The CPU has received a message that is out of order.
05h	Service Request Error:	Minor status field contains the request	specific error
		code. See table of Minor Error Status Codes below.
06h	Illegal Mailbox Type:	Service request mailbox type is either	undefined or
		unexpected.
07h	The PLC CPU's Service Request	It is recommended that the master wait a minimum of
Queue is full. The master should retry		10 ms before sending another service
later.

Minor Error Status Codes

Decimal	Hex	Description
-1	0FF	Service request has been aborted.
-2	0FE	No privilege for attempted operation.
-3	0FD	Unable to perform auto configuration.
-4	0FC	I/O configuration is invalid.
-5	0FB	Cannot clear I/O configuration.
-6	0FA	Cannot replace I/O module.
-7	0F9	Task address out of range.
-8	0F8	Invalid task name referenced.
-9	0F7	Required to log in to a task for service.

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