User manual

GMC-I Messtechnik GmbH 63
Note
 Memory locations 11 through 253 can be recalled by means of
interface programming, even if the sequence has not been
opened.
 If an invalid (empty) memory location is accessed in sequence
memory, command execution is aborted.
Err 21 appears at the display, and bit 5 is set in event register B
(SEQE, SEQuence error).
 If a USET or ISET parameter exceeds the ULIM or ILIM limit value
during recall, Err 21 appears at the display and bit 5 is set in
event register B (SEQE, SEQuence error).
As is the case with all other memory locations with an address
of greater than 10, addresses 254 and 255 can be stored with
*SAV and used for device configuration with *RCL.
*RST – Reset Device Settings
Function and manual operation:
See explanation on page 47.
Programming
Setting command: *RST
Example (HP-Basic): OUTPUT 713;"*RST"
Default settings:
OUTPUT OFF Output deactivated
USET 0 Voltage setpoint = 0
ISET 0 Current setpoint = 0
OVSET max Max. overvoltage protection trigger value
ULIM unom USET limit value = nominal voltage
ILIM inom ISET limit value = nominal current
OCP OFF Current limiting by means of current
regulation
DELAY 0 Output is deactivated immediately in
event of CC
TSET 0 (=tdef) Sequence dwell time = default duration
SEQUENCE OFF Sequence function deactivated
DISPLAY ON Display activated
MINMAX OFF No Min-Max value recording
TDEF 0.01
REPETITION 0 (= cont.)
START_STOP 011, 011
POWER ON Unchanged
T_MODE Unchanged
Stored parameters:
SETUP memory locations 1 ... 10 Unchanged
SEQUENCE memory Unchanged
DDT register Cleared
MINMAX memory Reset
Parameter settings Reset to default settings
Addressing status Unchanged
Input and output buffers Unchanged
Service request SRQ Unchanged
Status byte register STB Unchanged
Event registers ESR, ERA, ERB Unchanged
Enable registers ESE, ERAE, ERBE, SRE, PRE Unchanged
*SAV – Saving Device Settings
Function and manual operation:
See explanation in chapter 4.9.
Programming
Setting command: *SAV n
Parameter: n (memory location number)
Parameter type: Integer
Setting range: 0 *SAV 0 (display for manual
operation: Sto clr) clears
contents of the sequence
memory from the start address
to the stop address.
1 to 10
Current device settings are saved
to the selected SETUP register.
11 to 253 Current SEq parameter settings
are saved to the selected
sequence memory location.
254 Reference value U_Lo, I_Lo
255 Reference value U_Hi, I_Hi
Default setting: After RESET (*RST)
Memory location number: n/a
Memory location contents: unchanged
Example (HP Basic):
OUTPUT 713;"*SAV 3"
{current device setting is saved to
memory location 3}
*STB? – Status Byte Register Query
Functions
 Read out register contents (see also chapter 6.3 on page 60 and table:
“Query Commands for Status and Events Management” on page 86)
:
–The status of group messages from the three event registers
ESR, ERA and ERB (bits 2, 3 and 5)
–The status of the output buffer (not empty
➭ bit 4 MAV = 1,
empty
➭ bit 4 MAV = 0)
–The status of the MSS group message masked with the SRE
enable register from internal bits 2 through 5
– Bits 0, 1 and 7 are not used, and are always set to “0”.
When using the RS232 interface without the IEEE488 interface
value 1 is generally returned as a response.
Programming
Query command: *STB?
Response string: n (decimal equivalent)
Value: 16 n  124
Length: 3 characters, fixed
Example (HP Basic):
OUTPUT 713; "*IST"
ENTER 713; A$; DISP A$
 Display: 034 {034
2
= 0001 1000
10
}
Note
 A message is always made available as a result of the query.
 The response string is stored to the output buffer.
 The MAV bit is set for this reason.
 The value of n is always 16 in this case.
 The *CLS command clears the status byte register.
 However, the MAV bit is not cleared.