Measurement-computing Serial488/4 Manuel d'utilisateur télécharger pdf (Page 71)

Section 3 Command Descriptions

3.32

the DIO5 bit is set. An Execute command (X) must be received before the

DIO5 bit can be cleared.

DIO6 DIO6 is set w hen an invalid command is sent to the Serial488/4. The

M32

command will enable a Service Request to occur when an invalid command is

received. This bit is cleared after the controller sends a Status (

U0)

, or Error

Query (

) command and reads the status string from the Serial488/4.

DIO7 When the Serial488/4 generates a Service Request, the DIO7 bit will be set to

a logic one. This is used by the controller to determine that the Service

Request was generated by the Serial488/4.

DIO8 DIO8 is when the Serial488/4 memory is low. The

M128

command enables a

Service Request to occur when the memory low condition is encountered.

This bit is cleared when a memory low condition no longer exists.

Example:

PRINT#1,"CLEAR08"

reset the Serial488/4

PRINT#1,"OUTPUT08;M32X"

select SRQ on Bus error

PRINT#1,"OUTPUT08;F7X"

send an invalid bus command.

ERROR and SRQ LEDs should illuminate

PRINT#1,"SPOLL08"

display should be

112

(64+16+32)

64 denotes the Serial488/4 was the source of the SRQ. 16 denotes the Serial488/4 is

READY for more commands. 32 denotes a Command error. When serial polled, the

SRQ LED will turn off.

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 90 91

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Measurement-computing Serial488/4 Manuel d'utilisateur Page 71