Appendix B
Model 8642A/B
Appendix B: Writing Messages to the Display (cont'd)
Messages
The messages listed below might occur when you are accessing these special functions.
When using the instrument locally you will usually be able to view each message whenever it
occurs.
When using the instrument via HP-IB, you can access some messages using the "OE" or "OH"
commands. (Refer to Data Output, page 3-15, in the HP-IB portion of this Section III.)
Messages accessed this way can be output in the form of a message code number or an actual
alphanumeric message string. In the following message listing, the message code number that can
be output over HP-IB is provided to the far right of the message. If no message code number is
provided, then that message can only be read over HP-IB using Output Display (unless otherwise
stated),
which is also described in Data Output. The messages that can be output using "OE" or
"OH" can also be made to issue a service request. Refer to Service Request (page 3-27) in the
HP-IB portion of this Section III for information about service requests.
SPCL 3 ENTRY ERROR VI2
This message occurs if the characters entered were not valid.
ENTER SERVICE CMD .VI6
This message occurs if the ASCII code entered was not recognized as valid.
MESSAGE 1 CLEARED .V90
This message occurs when [ 6 1 I 5 i 1 5 ] is selected.
MESSAGE 2 CLEARED .V91
This message occurs when [ 6 I I 6 I 1 5
1
is selected.
MESSAGE 1 IS FULL .V92 21092
This message might occur after attempting to enter codes into an already full message. This
message sets the Execution Error bit in the 8642A/B Status Byte.
MESSAGE 2 IS FULL .V93 21093
This message might occur after attempting to enter codes into an already full message. This
message sets the Execution Error bit in the 8642A/B Status Byte.
MESSAGE 1 UNDEFINED V94 21094
This message might occur when manipulating message 1. The message means that message 1 has
not been initialized or RAM memory was lost. To initialize the message, select [ 6 1 ( 5 1 I 5 1.
This message sets the Hardware Error bit in the 8642A/B Status Byte.
MESSAGE 2 UNDEFINED .V95 21095
This message might occur when manipulating message 2. The message means that message 2 has
not been initialized or RAM memory was lost. To initialize the message, select I 6 1 1 6 I [ 5 I.
This message sets the Hardware Error bit in the 8642A/B Status Byte.
COMMENT
If the user-defined message begins with a set of characters resembling the alphanumeric codes
used in message displays, the firmware will automatically place those characters at the far right
of the display. If this right justification is not desired, put a space character at the beginning of
the message.
3-204
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