Purge functions can be activated directly when the PurgeMode is selected on the LDS. Each device is allowed to set the PurgeMode. When in remote control and purging by the IMM is activated with a hard wired dosing signal, PurgeTimeout and PurgeQuantity has no effect.

When in remote control and purging by the IMM is activated with the StartDosing Method, either PurgeTimeout/PurgeCyclicIdleTime or PurgeQuantity/PurgeCyclicQuantity must be set.

After the dosing signal is deactivated again, the PurgeMode will be reset to OFF by the LDS.

Table 13 – Values for PurgeMode

EnumValue	ValueAsText	Description
0	OFF	No purge function. Normal dosing via dosing signal.
1	WITH_COMPONENT_A	Purge A
2	WITH_COMPONENT_B	Purge B
3	WITH_COMPONENT_A_B	Venting
4	WITH_COMPONENT_A_OR_B	System chooses the component which is used for purging (usually the component with the larger remaining quantity)
5	CYCLIC_COMPONENT_A_B	Purge A and B cyclic

Figure 3 shows the interactions between ActivateRemoteControl, RemoteControlActivated, PurgeMode, PurgeStatus and the dosing signal.

Figure 3: Purge Scenario

Note: “LDS Auto” and “LDS Manual” are LDS internal parameters which are not covered by this specification.