Although, at the start of this section, it was stated that there are two types of message;
a Data Request and a Data Imposition; there is strictly a third type. This message has
the same format as a data imposition except no data is transferred and it has the effect
of making the instrument do an action. In this case the action is to save all of the
settings to non volatile memory.
The MASTER sends the following sequence.
Again device 2 receives the message which is initially treated as a Data imposition.
The ds mnemonic is taken as an instruction to do a data store to non volatile memory.
An index or data is superfluous and is not included. On doing a data store an
acknowledge is issued as shown below.
THE CONTROL CODES
APPENDIX E
Page 87
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