Using FDL
63
To set up a message, set:
•
bits in the Control/Config register, CntCfg, if necessary
If you set bit 2, the scanner sends the message to the high priority
queue on the scanner. The scanner maintains two FDL message
queues. When it gets the token, the scanner can send one message
from the high priority queue when it gets the token, even if the token
hold time has expired.
If you set bit 4 in the CntCfg register, the scanner does not include
this message block when it is displaying the status of FDL messages
on the LED.
•
the destination station, DstStn. The allowed range is 0 to 126.
•
the destination SAP, DstSap, if required. This is almost always
needed. The default value is 255, which means the message gets sent
to the default SAP at the destination. You usually send the message
to some specific SAP. The allowed range is 0 to 63, or 255.
When you send a message with a destination SAP, the scanner
automatically sets the high bit in the destination station number
when it sends the message. Do not set the high bit when you set the
destination station number.
•
the source SAP, SrcSap, if required. If you are sending a destination
SAP, you almost always want to send a source SAP. The default
value is 255. The use of the source SAP is application and module
dependent; the destination station may or may not require or use the
source SAP.
Note
This high priority refers to how the message is processed by
the scanner in getting it out on the network and has nothing
to do with a high priority frame control value. For example,
if the message type is SRDL, the message is processed as a
low priority message at the destination.
Summary of Contents for SST-PFB-SLC
Page 7: ...Contents vii Technical Data 105 Index 107 A...
Page 8: ...SST PFB SLC User s Guide viii...
Page 14: ...SST PFB SLC User s Guide 6...
Page 20: ...SST PFB SLC User s Guide 12...
Page 34: ...SST PFB SLC User s Guide 26...
Page 53: ...45 6 DP Master Application Examples...
Page 56: ...SST PFB SLC User s Guide 48 Sample Program...
Page 57: ...DP Master Application Examples 49 Sample continued...
Page 66: ...Using the Scanner Module as a DP Slave 58...
Page 67: ...59 8 Using FDL...
Page 75: ...Using FDL 67 Sample Program...
Page 76: ...SST PFB SLC User s Guide 68 Sample Continued...
Page 80: ...SST PFB SLC User s Guide 72 Sample Program...
Page 81: ...SST PFB SLC User s Guide 73 Sample Continued...
Page 85: ...SST PFB SLC User s Guide 77...
Page 86: ...SST PFB SLC User s Guide 78...
Page 87: ...79 9 Diagnostics This chapter describes system diagnostics...
Page 105: ...97 11 Network Parameter Defaults This chapter describes network defaults...