Signametrics Corporation SM4020, Руководство оператора

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33 Signametrics
SCANCleanRelays
H/W access Command
;
Polled Command
;
Description Clean all relays.
#include “SM4040.H”
int SCANCleanRelays (int iScan )
Remarks
This function Cleans all relays. The test connector must be present to clean all contacts.
This function verifies that the test connector is present. Cleaning takes about 13 seconds
for the SM404X and a bit less for the SM402X. Vibrating of the contacts at varying
switching patterns, while sourcing a high voltage/low current signal, causes deposits of
contaminants as well as oxidations to bounce off or be pinched through, thus resulting in
cleaner contacts. Doing this on a regular basis will prolong the contacts’ life. Both
Channel relays and Configuration relays are cleaned. Function type: Polled, requires
SCANReady() prior to using additional functions.
Parameter Type/Description
iScan int Identifies the Scanner. Scanners are numbered starting with zero.
Return Value
The return value is one of the following constants.
Value Meaning
SCAN_OKAY Scanner is OK.
Negative Value Error
Example
SCANCleanRelays(0); // Issue clean command
while( !SCANReady(0) ); // Wait for completion