Seq Records Delay Timing And Processing

Introduction

seq Records Delay Timing and Processing

• The calc record serves as a 10Hz Time reference.
• The seq record:
  • is scanned every 10 s
  • each of the LNKx get its input value from the calc reference, delayed by DLYx
• the seq record stays active until all LNKs have been processed.
• the nested second, delayed, and "PPed" seq record "seq2" doesn't delay the execution of LNK4
• LNK5 to a dummy record introduces an addditional delay, before "ai5" is "FLNKed" (Listing 1)
  otherwise (LNK5 undefined) "ai4" and "ai5" do get the (almost) same time (Listing 2)
Listing 1

> camonitor ai1 ai2 ai3 ai4 ai5 ai6
ai1                            <undefined> 0 UDF INVALID
ai2                            <undefined> 0 UDF INVALID
ai3                            <undefined> 0 UDF INVALID
ai4                            <undefined> 0 UDF INVALID
ai5                            <undefined> 0 UDF INVALID
ai6                            <undefined> 0 UDF INVALID

ai1                            2015-06-12 11:20:43.537023 10.4  
ai2                            2015-06-12 11:20:45.532220 12.4  
ai3                            2015-06-12 11:20:45.927412 12.8  
ai4                            2015-06-12 11:20:46.723239 13.6  
ai5                            2015-06-12 11:20:50.718449 17.6  
ai6                            2015-06-12 11:20:51.422657 18.3  

ai1                            2015-06-12 11:20:53.548024 20.5  

Listing 2

> camonitor ai1 ai2 ai3 ai4 ai5 ai6
ai1                            2015-06-12 11:34:01.036987 10.4  
ai2                            2015-06-12 11:34:03.032172 12.4  
ai3                            2015-06-12 11:34:03.427368 12.8  
ai4                            2015-06-12 11:34:04.222552 13.6  
ai5                            2015-06-12 11:34:04.222568 13.6  
ai6                            2015-06-12 11:34:08.923422 18.3  

ai1                            2015-06-12 11:34:11.037168 20.4  

Sources

inside GSI

git at gitorious.gsi.de:

git clone git://gitorious.gsi.de/epics-playground/seq-record.git

outside GSI

epics-playground-seq-record-master.tar.gz: tarball