MGR10 A/B/C - Revision : I (for 7.0 software revision)
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6.3.6 Status Reporting Commands
There are five groups of registers involved.
The Questionable Data and Operation groups each consist of three registers;
- The Condition Register contains the current status of the instrument and is continuously
updated. The register value can be read at any time using the appropriate query (?) command.
- The Event Register detects ‘0’ to ‘1’ transitions in the Condition Register and the appropriate
bit is set. The register value can be read at any time using the appropriate query (?) command.
Reading an Event Register results in all the bits of that register being cleared.
- The Enable Register is a mask which allows any of the bits from the Event Register to set the
appropriate bit in the Status Byte. Setting an enable bit to ‘1’ enables the event bit; clearing the
enable bit inhibits the corresponding event bit. The register value can be read at any time using
the appropriate query (?) command.
The Standard Event group is similar, but consists only of the Event and Enable Registers. There is no
Condition Register.
The Output Buffer stores a single line message to be transmitted to the bus. This can be up to 80
characters long. The message is normally the result of a query (?) command.
The Status Byte group is used to read a summary of the other registers.
Note that all Event Registers are cleared after reading, but the Condition Registers, Enable Registers,
and Status Byte are left unchanged after reading.
The Status Reporting System is summarised in the following diagram.
