A43: Adjustment of setpoint S1‘ (not available on all types of controllers)
By closing switching input E1, setpoint S1 can be switched to a setpoint S1’. Setpoint S1’ can be
either relative to setpoint S1 or an independent, freely adjustable, control setting. The setpoint S1’
can only be accessed if input E1 is closed. An additional option is to activate the standby mode
with the switching input E1. This mode has priority and is not affected by the setting of parameter
A45.
A44: Operation mode
If a sequential operation mode or the time-dependent load replacement is activated with parameter
A40 and A41, parameter A44 selects which outputs are involved in this mode.
Additionally it is possible to define pairs of outputs that work as bypass-groups. In this case the
activation of the valve output leads to a smaller cooling performance. In the bypass-groups there is
a standard linkage of the outputs, i.e. K1=compressor, K2=bypass, K3=compressor, K4=bypass,
K5=compressor, K6=bypass. Bypass-groups with an inverted valve output are intended for plants
where the bypass is switched on together with the compressor and switched off together with the
valve output.
A special function (A44=12) allows the operation of two compressors together with a common
bypass with K1+K3=compressor, K2=bypass. In this case K4 becomes inactive, because
parameters P3 and P14 are reserved. A further special function (A44=13) is intended for the
operation with double bypass-groups with K1=compressor, K2+K3=bypass, K4=compressor,
K5+K6=bypass.
Not that the sequential operation mode and the time-dependent load replacement are effective
independently of each other if activated with parameters A40 and A41. If bypass operation mode is
selected, the required valves are determined summarily in the control program.
If the respective setting requires several bypass valves to be switched on, the output with the
highest number will be switched on first.
A45: Standby mode
Activation or deactivation of the standby key. In standby mode the display indicates “OFF”.
A51-A56: Switch mode K1-K6
The switching sense for the relays, i.e. cooling or heating function, can be programmed
independently.
The respective relay may not be part of the load replacement mode (see parameter A44) or part of
any bypass-group. If this applies the respective relay switches to cooling function independently of
this parameter
Note that the power display indicates the active outputs K1-K6 only summarily, if A44=0 and the
switch modes are different. In this case a differentiation between heating and cooling power is not
possible. In all other operation modes the invertible outputs are not effective for power
determination.
A59: Setpoint offset
The here adjusted value will build the difference to the activated setpoint, i.e. there is no regulation
according to the pre-set value, but according to the sum of setpoint and the value of A59.
All secondary setpoints that apply to outputs involved in the load replacement or bypass-groups
are affected by this parameter as well. The remaining free outputs and the alarm limit values are
not affected.
L0: Individual address in LON-network (Node)
L1: Individual address in LON-network (Subnet)
STOERK TRONIC devices can be hooked with "self installation". In this case, however, each
participant has to be assigned a clear address. This address corresponds to the knot address and
subnet address with Domain=0.
The address of the knot can only be changed, if the knot was not tied externally (SNVT
"nciNetConfig" = CFG_LOCAL), otherwise the changed value is not saved (after releasing the set
key the old value is reset).
Summary of Contents for ST710-PWHVM.26
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