Hioki BT3564, Instruction Manual, Page: 112 / 210

8.4 Communication Methods
106
The instrument implements the status model defined by IEEE 488.2 with regard
to the serial poll function using the service request line.
The term "event" refers to any occurrence that generates a service request.
The Status Byte Register contains information about the event registers and the
output queue. Required items are selected from this information by masking with
the Service Request Enable Register. When any bit selected by the mask is set,
bit 6 (MSS; the Master Summary Status) of the Status Byte Register is also set,
which generates an SRQ (Service Request) message and dispatches a service
request.
Status Byte Register
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
unused
SRQ
ESB MAV
unused unused
ESB1 ESB0
MSS
& & & & & &
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
unused
0 ESB MAV
unused unused
ESB1 ESB0
Logical OR
Status Byte
Register (STB)
Service Request
Enable Register
(SRER)
Service Request
SRQ occurrence
Output Queue data information
Standard Event Register Description
Each of these bits corresponds
to a specific event register
Overview of Service Request Occurrence
HIOKI BT3564A961-02