Fluke 2620A Using the Computer Interface, Computer Interface Command Set, Lock Lock? Locs Log?

Using the Computer Interface	4
Computer Interface Command Set

Table 4-8. Command and Query Reference (cont)

LOCK

LOCK?

LOCS

LOG?

Lock the instrument front panel so that only use of the arrow keys and the simultaneous use of Fand Bare recognized. The following LOCK commands are recognized:

Unlock

Lock and begin review. If the instrument is not in review, a review is begun (even if there are no defined channels.)

Monitor lock. If the instrument is not already in monitor, an Execution Error is generated.

The three LOCK states are non-volatile. If power is interrupted, the instrument retains the last LOCK setting.

Retrieve instrument front panel lock status.

0, 1, or 2 is returned, identifying the state set with the LOCK command.

Local without Lockout (RS-232 only)

Enter the IEEE-488.1 local without front panel lockout (LOCS) state. All front panel buttons are enabled, and the REM annunciator is not lit. This is the state assumed by the instrument at power-up reset.

If this command is used with the IEEE-488 interface, an Execution Error is generated.

Retrieve Logged Data Query (RS-232 only)

Return the oldest logged scan values for all configured channels and remove them from storage. This query is valid during scanning. The remaining count of stored scans (LOG_COUNT?) is decremented by 1. Channels defined as OFF are not included. If there are no (more) logged scans or if the instrument is a Hydra Data Acquisition Unit, an Execution Error is generated.

The response includes the following information:

Date and time at the start of the logged scan.

Date and time are returned as integer values. For example, returned values of "20,32,44,5,18,90" signify May 18, 1990 20:32:44.

Values for the channels measured.

The measurement data is returned as a list of scientific notation values, separated by commas. For example, "+3.4567E-3,-4.9876E+6" are valid measurement values. If the fast measurement rate is used, the values have one less digit of resolution ("+3.457E-3, -4.988E+6").

If you are using the RS-232 interface format 2, valid data responses would include: +894.45E+3 OHM,-9.1234E-3 C.

State of the Digital I/O lines and totalize count at the end of the scan.

Two values are returned. The first is an integer in the range 0 through 15, identifying the four alarm output states. The second is an integer in the range 0 through 255, identifying digital I/O line states.

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