Measurement-computing Micro 488/EX rev.2.1 Uživatelský manuál stáhnout pdf (Strana 150)

Section 5 Command Descriptions

5.80

Address change 6 2 G0: Address status change has not occurred.

G1: Address status change has occurred.

Addressed state 9 1 T: Talker

L: Listener

I: Idle

Service Request 11 2 S0: SRQ is not asserted.

S1: SRQ is asserted.

Error code 14 3 Enn:

Letter 'E' followed by two-digit error code.

Refer to Appendix B for Error explanations.

Triggered 18 2 T0: No IEEE Trigger command received.

T1: Received the IEEE Trigger command.

Cleared 21 2 C0: No IEEE Clear command received.

C1: Received the IEEE Clear command.

Error description 24 17 Text of error message

The Operating Mode (C or P) indicates whether or not the Micro488/EX is the

Active Controller. If the Micro488/EX Passes Control to another device, then the

Operating Mode indicator will change from "C" to "P". When the Micro488/EX

regains control, then the indicator will again be "C". If the Micro488/EX is not the

System Controller, then it will initially be a Peripheral and thus the indicator will be

"P". It will, of course, become "C" when the Micro488/EX receives control from the

Active Controller.

The Bus Address is the IEEE bus device address assigned to the Micro488/EX by

the internal hardware switch.

The Address Change (G0, G1) indicator is set whenever the Micro488/EX

transitions from the idle state to a Talker or Listener, or from a Talker or Listener state

to an idle state. It will not indicate when a change is made from a listener to a talker or

a talker to a listener. The address change is reset when

STATUS

is read.

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Measurement-computing Micro 488/EX rev.2.1 Uživatelský manuál Strana 150