1656 & 1657 Battery Element Tester Owner’s Manual
STS Instruments Page 69 of 88
8.7.5 *GTL
Command Syntax: *GTL
Purpose: The *GTL command releases the bus and sets the instrument in local
mode.
Description: This command sets the instrument for front panel operation.
8.7.6 *IDN?
Command Syntax: *IDN?
Purpose: Returns the instrument’s Identity string.
Description: This query only command returns the response in a SCPI compliant
format. The query response contains four fields separated by a comma.
Query response: Manufacturer, model number, hardware revision, firmware revision,
interface types and serial number. The interfaces types are encoded as
follows
bit 0 = RS232 weight = 1
bit 1 = RS485 weight = 2
bit 2 = USB weight = 4
bit 3 = PLC weight = 8
Example: STS, 1656, 1, 1, 5, 12345
This example indicated hardware = 1.0, firmware = 1.0, Interface are
RS232 and USB (1 + 4)
8.7.7 *LLO
Command Syntax: *LLO
Purpose: The *LLO command locks the instrument front panel.
Description: This command locks the instrument from accessing control through the
front panel.
8.7.8 *OPC
Command Syntax: *OPC
Purpose: This command instructs the instrument to set the operation complete
status bit.
Description: The operation complete command allows commands that take a long
time to execute to signal busy status by returning a “1” to any *OPC?
query that follows. On the STS 1656/1657, all command execute
immediate so the *OPC command is not required and is ignored when
issued.
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