Mitsubishi Electronics FX1S manual Limits on the number of branches

FX Series Programmable Controllers STL Programming 3

Limits on the number of branches

• Please see page 3-14 for general notes on programming STL branches.

Notes on using the FX-PCS/AT-EE software

• Please see page 3-15 for precautions when using the FX-PCS-AT/EE software.

3.8Using STL To Activate Multiple Flows Simultaneously

FX1S FX1N FX2N FX2NC

In the previous branching technique, it was seen how a single flow could be selected from a group. The following methods describe how a group of individual flows can be activated simultaneously. Applications could include vending machines which have to perform several tasks at once, e.g. boiling water, adding different taste ingredients (coffee, tea, milk, sugar) etc. In the example below when state S20 is active and X0 is then switched ON, states S21, S31 and S41 are ALL SET ON as the next states. Hence, three separate, individual, branch flows are ‘set in motion’ from a single branch point. This programming technique is often called a ‘Parallel Branch’. To aid a quick visual distinction, parallel branches are marked with horizontal, parallel lines.

S 20

X0

Y0	STL	S	20
	OUT	Y	0
	LD	X	0
	SET	S	21
	SET	S	31
	SET	S	41

S 21

S 31

S 41

3-12