User Guide

FS-8700-128 Safetran SCS-128 Manual Page 13 of 15
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5.3. Server Side Map Descriptors
5.3.1. FieldServer Specific Map Descriptor Parameters
Column Title Function Legal Values
Map_Descriptor_Name Name of this Map Descriptor
Up to 32 alphanumeric
characters
Data_Array_Name
Name of Data Array where data is to be
stored in the FieldServer
One of the Data Array
names from “Data Array”
section above
Data_Array_Offset Starting location in Data Array
0 to maximum specified
in “Data Array” section
above
Function Function of Server Map Descriptor Server
Server_Hold_Timeout
Specifies time FieldServer will reserve
Server side connection while waiting for
the Client side to update data in
Data_Array (if necessary)
>1.0s
5.3.2. Driver Specific Map Descriptor Parameters
Column Title Function Legal Values
Node_Name Name of Node to fetch data from
One of the Node
names specified in
“Client Node
Descriptor” above
SCS128_Poll_Type
Specify type of requests to handle from client.
‘Indications’ Handle all read requests from client.
‘Controls’ Handle all write requests from client
Indications, Controls
Data_Type
‘Flag’ each byte of Controls will be stored in 8
consecutive locations in the Data Array.
Similarly while responding Indications; status
byte will be composed with data from 8
consecutive locations.
‘Byte’ each byte of Controls will be stored as 8
Bit Integer at specified location. Similarly while
responding Indications; status byte will be
composed with data from single location.
‘Register’ every two bytes of Controls will be
stored as 16 Bit integer at specified location.
Similarly while responding indications; two
Control bytes will be composed with data from
single location.
’32-Bit_Reg’ every four Control bytes will be
stored as 32 Bit integer at specified location.
Similarly while responding indications; four
Control bytes will be composed with data from
single location.
Refer to Appendix A
Flag, Byte, Register,
32-Bit_Reg
Length
Length of Map Descriptor
Number of indications to serve or number of
controls to store as per Data_Type.
Flag: 8-256, 16
Byte: 1-32, 2
Register: 1-16, 1
32-Bit_Reg: 1-8, 1
Address Irrelevant parameter for this driver