Measurement-computing Serial488/4 Manuel d'utilisateur télécharger pdf (Page 70)

Section 3 Command Descriptions

3.31

Serial Poll Status Byte

The Serial Poll Status byte is sent upon receiving the serial poll command from

the controller. Refer to the SRQ description for details on how the Serial Poll Status

byte is affected. Below is a description of the significance of each bit in the Serial

Poll Status byte.

Bit Location Value

(SRQ Bit Value if set to logic 1)

DIO1(LSB) 1 serial data available on port 1

DIO2 2 serial data available on port 2

DIO3 4 serial data available on port 3

DIO4 8 serial data available on port 4

DIO5 16 Ready for more commands

DIO6 32 Command Error

DIO7 64 Service Request bit

DIO8 (MSB) 128 Memory low warning

Serial Poll Bit Description

DIO1 The DIO1 bit is set by the receipt of serial data on port 1. When enabled by

the

command this condition will also generate a Service Request. DIO1 is

cleared when no more data is available to be read on port 1.

DIO2 The DIO2 bit is set by the receipt of serial data on port 2. When enabled by

the

command this condition will also generate a Service Request. DIO2 is

cleared when no more data is available to be read on port 2.

DIO3 The DIO3 bit is set by the receipt of serial data on port 3 When enabled by

the

command this condition will also generate a Service Request. DIO3 is

cleared when no more data is available to be read on port 3.

DIO4 The DIO4 bit is set by the receipt of serial data on port 4. When enabled by

the

command this condition will also generate a Service Request. DIO4 is

cleared when no more data is available to be read on port 4.

DIO5 The DIO5 bit is set after an entire command string has been received and

processed by the Serial488/4. The bit is cleared w hile the Serial488/4 is

processing commands which have been received from the controller. When

used with the

M16

command, a Service Request will also be generated w hen

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 90 91

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Measurement-computing Serial488/4 Manuel d'utilisateur Page 70