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T400 Controller Facilities Manual

667/EB/20200/000 Page 2-6 Issue 9

2.6.4 Mode Operation

(See also section 9.)

2.6.4(a) Fixed Time

Each stream will have its own fixed sequence of stages and will move around it

independently of the other streams. Alternatively the streams can be linked, allowing

groups of stages to run together, i.e. Linked Fixed Time.

2.6.4(b) VA

Each stream will move around its own stages according to its own on street demands

and extensions independent of any other streams.

2.6.4(c) CLF

The controller has up to 8 plans. Each plan can run up to 16 groups. Each group when

active can operate up to 4 influences simultaneously,1 influence for each stream. There

is an influence set for each plan where an influence set consists of 4 influences for each

of the 16 groups (Combinations A, B, C and D). In general, Influence Set Combination

‘A’ would be used for Stream 0, Influence Set Combination ‘B’ for Stream 1, etc.

In this way it is possible on introduction of a group to operate different influences at

the same time on difference streams.

If it is required that, during a given group timing, a stream is not required to change

influence, then this stream’s influence should be set to Group Influence number 7

followed by the related stage number, i.e. the number of any stage contained within the

stream upon which the influence acts. (See sub-section 9.9.7, Figure 9.7).

Only one plan can be in operation on the controller at once while in CLF. CLF can run

on all streams at once or on some streams with the remainder running higher priority

modes. If CLF is disabled on a stream then that stream will run the next lower priority

mode.

For further description of CLF mode see section 9.9.

2.6.4(d) Manual Control

The Manual Stage Buttons are programmed so that each of the 7 buttons can select:

a) a combination of stages, one from each stream, that will run

simultaneously.

b) one stage from any one stream

The all red button can be programmed to select:

a) an all red condition on all streams

b) an all red condition on any one stream - it would normally be necessary

to programme other buttons for all red conditions on any other streams.

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