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Lake Shore Model 625 Superconducting MPS User’s Manual
5-38 Computer Interface Operation
IEEE
IEEE-488 Interface Parameter Command
Input: IEEE <terminator>, <EOI enable>, <address>[term]
Format: n,n,nn
<terminator>
Specifies the terminator. Valid entries: 0 = <CR><LF>,1 = <LF><CR>,
2 = <LF>, 3 = No terminator (must have EOI enabled).
<EOI enable> Sets EOI mode: 0 = Enabled, 1 = Disabled.
<address> Specifies the IEEE address: 1
–
30. (Address 0 and 31 are reserved.)
Example: IEEE 0,0,4[term] – After receipt of the current terminator, the instrument uses <CR><LF> as the
new terminator, uses EOI mode, and responds to address 4.
IEEE?
IEEE-488 Interface Parameter Query
Input: IEEE?[term]
Returned: <terminator>, <EOI enable>, <address>[term]
Format: n,n,nn (Refer to command for description)
KEYST?
Keypad Status Query
Input: KEYST?[term]
Returned: <keypad status>[term]
Format: n 1 = key pressed, 0 = no key pressed.
Remarks: Returns keypad status since the last KEYST?. KEYST? returns 1 after initial power-up.
LIMIT
Limit Output Settings Command
Input: LIMIT <current>, <voltage>, <rate> [term]
Format: +nn.nnnn, +n.nnnn, +n.nnnn
<current>
Specifies the maximum output current setting allowed: 0 – 60.1000 A.
<voltage> Specifies the maximum compliance voltage setting allowed: 0.1000 – 5.0000 V.
<rate> Specifies the maximum output current ramp rate setting allowed: 0.0001 – 99.999 A/s.
Remarks: Sets the upper setting limits for output current, compliance voltage, and output current ramp rate. This
is a software limit that will limit the settings to these maximum values.
LIMIT?
Limit Output Settings Query
Input: LIMIT? [term]
Returned: <current>, <voltage>, <rate> [term]
Format: +nn.nnnn, +n.nnnn, +n.nnnn (Refer to command for description)
LOCK
Keyboard Lock Command
Input: LOCK <state>, <code>[term]
Format: n,nnn
<state>
0 = Unlock, 1 = Lock All, 2 = Lock Limits.
<code> Specifies lock-out code. Valid entries are 000
–
999.
Remarks: Locks out all front panel entries operations.
Example: LOCK 1,123[term]
–
Enables keypad lock and sets the code to 123.