Siemens EH.75M.11. Especificaciones descargar pdf (Pagina 72)

T400 Controller Facilities Manual

667/EB/20200/000 Page 9-12 Issue 9

When ‘G1/G2’ is received at the central office the computer releases control

immediately. When ‘G1/G2’ stops being sent the computer will not regain control until

reset by the operator.

Normally ‘G1/G2’ is used to indicate no lamp power, i.e. condition (iii). If it is used to

indicate condition (i), (ii) or (v) then the modes that are selected may not be a higher

priority than UTC and would cause the computer to release control unnecessarily and

then require computer operator intervention to restore UTC control.

Ideally conditions (i), (ii) and (v) should be used with an ‘MC’ or ‘RR’ bit, condition

(iv) with a ‘DF’ bit and condition (vi) with a ‘CF’ bit, although the availability of bit

allocation will be the deciding factor.

If stage 2 is not used during UTC mode or there is no ‘G2’ bit, then another ‘G’ bit

may be programmed to be returned along with ‘G1’.

Figure 21.15 indicates where to request the conditions required.

In the example shown, ‘G1/G2’ is returned when there is no lamp power.

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Siemens EH.75M.11. Especificaciones Pagina 72