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REGULATION OF UNITS IN PARALLEL
· Installation management by chaining of unit CPU's
The card responsible for general regulation is that for unit G1 (card number = 0). Dialogue between cards is by
chaining.
In order to ensure that the machines do not all start up and stop simultaneously, their set points are staggered.
The regulation instruction CONSREG for each machine is determined in accordance with the following
parameters :
VCONSE ó General regulation instruction (°C)
VCONSE is the water instruction entered on unit G1. This unit transmits it to the other
units.
PRIG ó Unit start-up priority
PRIG is processed and transmitted to the other units by the unit G1. PRIG changes
automatically every Monday at 6 pm, which levels out operating times between the
different units
DIFETG ó Differentail between units (°C)
DIFETG is an instruction set on each machine.
In the case of an installation with 4 units, regulation instructions CONSREG are calculated as follows :
In the event of a breakdown, there is no logging between units. If a machine loses its connection with unit G1, it
regulates its instructions independently of the other units. If card no.0 of machine G1 is absent from the
chaining, then all units are regulated independently according to their own instructions.
Setting instruction CONSREG
PRIG Unit G1 Unit G2 Unit G3 Unit G4
0 VCONSE VCONSE+DIFETG VCONSE+(2xDIFETG) VCONSE+(3xDIFETG)
1 VCONSE+DIFETG VCONSE+(2xDIFETG) VCONSE+(3xDIFETG) VCONSE
2 VCONSE+(2xDIFETG) VCONSE+(3xDIFETG) VCONSE VCONSE+DIFETG
3 VCONSE+(3xDIFETG) VCONSE VCONSE+DIFETG VCONSE+(2xDIFETG)
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