13-56 BE1-951 Testing and Maintenance 9328900990 Rev L
Table 13-93. x62 Mode 2 Timer Initiate Commands
Command Purpose
A= Gains write access.
CS-143=P Selects 143 for pulse F-T-F operation.
CO-143=P Executes 143 pulse F-T-F operation.
CS-143=P Selects 143 for pulse F-T-F operation.
CO-143=P Executes 143 pulse F-T-F operation.
EXIT Exit select and operate mode.
Step 3: Use the RS-LGC command to retrieve logic variable data from the SER. Verify that a 143
FALSE-TRUE-FALSE pulse action was logged and that approximately 400 milliseconds after
the initial 143 FALSE-TRUE-FALSE initiate signal action, the 162 Timer output went TRUE.
Then, approximately 20 seconds later, duration timer T2 expired and the timer output went
FALSE despite a second 143 FALSE to TRUE initiate signal while the duration timer was active.
Figure 13-6 illustrates the timing relationship of the 143 Switch and x62 Timer.
D2843-09
10-23-03
Figure 13-6. x62 Mode 2 (One-Shot Nonretriggerable) Timing Example
Mode 3 - One-Shot Retriggerable
Step 1: Prepare the 62 Timer for Mode 3 testing by transmitting the commands in
Table 13-94.
Table 13-94. x62 Mode 3 Test Commands
Command Purpose
A= Gains write access.
SL-N=NONE Zero out custom logic settings. Overwrite with LOGIC=NONE settings.
Y Confirm overwrite.
SL-N=T62 Sets T62 as custom logic name.
SL-62=3,343,0 Enables 62 one-shot, retriggerable mode, 343 initiate, no blocking.
SL-343=3 Enables 343 Switch momentary pulse mode.
SN-343=62_INI,INI,NORMAL Name Switch 343 to make SER easier to read.
NOTE
The 143 Switch action is performed twice in this test. To illustrate the action of
the timer mode, the commands of Table 13-93 should be executed as quickly as
possible. Ideally, this test should be repeated within 20 seconds. If this is a
problem, try extending the dropout timer setting to 30 seconds.
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