YME Engineering Course

J. SEQUENCE CONTROL FUNCTION
J.5. LABORATORY EXERCISE J
J.5.1 QUESTIONS
Q1. How many rules are there in a sequence table ST16 block?
Q2. How many common switches are there per FCS and how many of them
are system defined?
Q3. When are global switches used and how many of them can be defined per
FCS?
Q4. How many logical operators can a logic chart block LC64 handle?
J.5.2 EXERCISE
E1. Using a sequence table generate the following sequence.
When the level of the tank (Tag no. LIC500) goes high (HI alarm), open
the outlet valve (Tag no. VALVEA) and close the inlet valve (VALVEB).
When the level of the tank goes low (LO alarm), close the outlet valve and
open the inlet valve. The inlet and outlet valves are on/off valves and can
be configured as digital outputs.
E2. Generate an annunciator message “V-001 PRESSURE VERY LOW”
when common switch PSLL001 is on and when the PSLL001 is off,
recover the message.
E3. Generate an operator guide message “REACTOR SEQUENCE
COMPLETED” when common switch TX001 is ON.
E4. Configure a pump [Tag no. P001 (MC-2 block)]. Start the pump after 10
seconds once the discharge pressure (Tag no. PIC500) goes low. Use a
logic chart to achieve the same.
YME Training Center J-29
CS3KR3-ENG 1 ST Edition Jan 2002