BIRD THRULINE 4020 series, Instruction Book

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RS-232 Interface
39
Revision History Word (U2):
The format of the revision history word is
sh own in F igu r e 34.
Self Test (J0)
Function
Initiates a hardware and software test.
Remarks
Results are stored in the U1 status
before reading the result.
Writable Store (Wxxxxxx)
Function
Storage for six bytes of ASCII data.
Remarks
Data stored is lost when the 4421 is turned off.
Data is sent back as part of the U2 status word.
VCO Valid Command
Option
Set wh en n o IDDCO is r eceived.
PS Self-test Pass Set wh en a self-t est h a s been in it ia t ed
by t h e J 0 com m a n d a n d t h e t est r esu lt
is a ccept a ble.
FL Self-test Fail
Set wh en t h e self-t est h a s fa iled. (Th is
is t h e defa u lt con dit ion .)
Figure 34
Revision History
Word Format
Header
Writable stores
Software Rev level
Hardware Rev level
Interface standard
* YY is replaced with current software revision level.
** ZZ is replaced with current hardware revision level.
* **
4 0 X X X X X X Y Y Z Z TERM RS-232