User manual

GMC-I Gossen-Metrawatt GmbH 65
DCL, SDC – Device Clear Function
Functions
• Clears input and output buffers at the computer interfaces.
• e.g. requested data which have not been picked up
• Clears internal interface waiting times or disabling.
•The KONSTANTER is ready to receive data.
• Manual operation is not possible.
Programming
Setting command: DCL (= device clear)
SDC (= selected device clear)
Used for: Both interfaces
Setting command: CLEAR 713 (
^
SDC )
Used for: One IEC interface only, command for
specified bus user, fast
Setting command: CLEAR 7 (
^
DCL )
Used for: IEC interface only, universal command for
all bus users, fast
Action
Addressing status Unchanged
Input and output buffers Cleared
Service request SRQ Unchanged
Status byte register STB MAV bit = 0, otherwise Unchanged
Event registers ESR, ERA, ERB Unchanged
Enable registers ESE, ERAE, ERBE, SRE, PRE Unchanged
Set and stored parameters Unchanged
Example (HP Basic):
a) OUTPUT 713;"DCL"
b) CLEAR 713
c) CLEAR 7
DELAY, DELAY? – Output Off Delay for OCP
Settings
Function and manual operation:
See explanation on page 26.
Programming
Setting command: DELAY v
Parameter: v (value)
Parameter type: Real number
Setting range: 00.00 [s] ... 99.99 [s]
Resolution: 10 ms
Default setting: 00.00 [s] (after RESET (*RST))
Example (HP Basic):
OUTPUT 713;"DELAY 10.7"
{output off delay: 10.7 seconds}
Query
Displays selected delay time from initialization of current
regulation until the power output is deactivated.
Programming
Setting command: DELAY?
Response string: DELAY v
Length: 11 characters, fixed
Parameter: v (value)
Format v: nn.nn
Example (HP Basic):
OUTPUT 713; "DELAY?"
ENTER 713; A$
DISP A$
→Display: DELAY 10.70
DISPLAY, DISPLAY? – Activate / Deactivate Digital Displays
Settings
Functions
• Activate / deactivate the 7-segment displays during remote
operation
• If the display has been deactivated, it need not be continuously
refreshed.
• This results in somewhat shorter measuring and setting times
during interface operation.
Programming
Setting command: DISPLAY txt
Parameter: txt (status)
Parameter type: Text (character)
Setting range: OFF 7-segment display deactivated
ON 7-segment display activated
Default setting: ON (after RESET, *RST)
Example (HP Basic):
OUTPUT 713; "DISPLAY OFF"
{deactivate 7-segment display}
Comment
If the “REMOTE” operating mode is exited, the 7-segment
display is automatically reactivated.
Query
On-off status of the 7-segment displays
Programming
Query command: DISPLAY?
Response string: DISPLAY txt
Length: 11 characters, fixed
Parameter txt (status)
Example (HP Basic):
OUTPUT 713;"DISPLAY?"
ENTER 713; A$
DISP A$
→Display: DISPLAY OFF
ERA?, ERB?, *ESR? – Event Register Query
Functions
• Event register (see also chapter 6.3 on page 60 and the table:
“Query Commands for Status and Events Management” on
page 86).
• The device is equipped with 3 event registers.
• An enable register is assigned to each event register.
• The registers can be queried separately.
• Acquiring and saving status changes for specific device
functions
• Information regarding events which have occurred at the device
since the last query
• The inputs respond in an edge controlled fashion.
• A bit is set if the associated function:
– Is changed from FALSE to TRUE (input ),