Honeywell EXCEL 5000 User Manual page 112

ALPHABETIC REFERENCE
74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)
You select the sequential mode of load switching in each priority group by setting
Parameters P15 (for Group 1), P16 (for Group 2) and P17 (for Group 3) in XFM 35
to zero. XFM 35 passes these parameters to each XFM 36-1 via the corresponding
user addresses ID___Rotating_P1, ID___Rotating_P2, and ID___Rotating_P3. The
user address is not required if only XFM 36-1S is in the priority group.
The sequential mode switches an XFM 36-1/S load depending on its rank in the
group (Parameter P14 [Load Number]). User address IA___On_Index_P1/2/3
contains the rank of the load that was the last load ON. For example, if
IA___On_Index_P3 is equal to 6, there are six loads that are ON in Group 3. Loads
are turned ON starting with Load Number 1. The second XFM 36-1/S input, RM, and
the general functions within this XFM make the final decision to switch on the load.
The next load to switch on is the XFM 36-1/S with its Parameter P14 equal to 7. The
next load to switch off in this example is the one with P14 equal to 5.
User address IA___Off_Index_P1/2/3 has no function in sequential load switching
and therefore is not used .
The criteria for sequential switching ON a load are as follows:
• The XFM 36-1/S is in automatic operating mode (Parameter P13 = 0).
• Parameter P15/16/17 in XFM 35 is 0 and the corresponding user address
ID___Rotating_P1/2/3 is 0 (ID___Rotating_P1/P2/P3 is not required for groups
with XFM 361S.)
• The power value at the first input Po is positive and equal to or greater than the
load power Parameter P15 of the XFM 36-1/S.
• The value of the user address IA___On_Index_P1/2/3 is equal to the XFM 36-1/S
load number set in P14 minus 1 (for example, XFM 36-1/S is in the first priority
group; the value of IA___On_Index_P1 is 7; and the load number Parameter P14
is 8).
• The minimum OFF time (Parameter P11 of the XFM 36-1/S) has expired.
• If Parameter P16 of the XFM 36-1 is 1/S, input RM must also equal 1 (see the
RM Functions description later in this section for details).
• User addresses ID___Peak_load and ID___Shutdown are 0 (that is, the peak
load and shutdown functions are not active).
The criteria for sequential switching OFF a load are as follows:
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EXCEL CARE CONTROL ICONS