Figure 6.1 Piston Cycle Graph
6.3 ADDITIVE PORT ASSIGNMENT
For most additive methods, an additive output (injection signal) and an additive input are required. During
configuration, an additive FCM Port# will be assigned by the user. This port assignment will be for the additive
output (injection signal). Valid FCM Port# selections for the additive outputs are ports 0 and 1 on the internal I/O
board and 0, 1, 2, and 3 on an external FCM. The output port that is selected will dictate which port is used for
the additive input. For example, if Port 0 is selected as the FCM Port#, the output will be on port 0 and the
corresponding input will be at port 7. Below is a table of possible port assignments.
When using the Piston Only method, there is no additive input signal to be monitored. However,
the input port that corresponds to the selected output port will be dedicated as an additive port.
This port will be out of service and cannot be used for any other function.