Precision Digital PD554 - Manual (Page 27)

The link parameter establishes the operation of the controller when a program has finished
running. The link codes that determine the controller operation when a program ends are
shown in Table 3 below.
PV
Link Code Controller Operation When a Program is Complete
RST
Shift to RESET (Stop)
(All operation stops)
HOLD
Continues to run at the last set point
(Will enter STOP mode when RST key pressed)
PTN1
Runs PTN1 (Program 1)
(Program 1 will infinitely repeat if set in 1.LC)
PTN2
Runs PTN2 (Program 2)
(Program 2 will infinitely repeat if set in 2.LC)
Table 3: Link Codes
This parameter sets the starting set point for program 1. This set point is used when the
program is se t for a STC of SSP, or to calculate the ramp time for segment 1 if needed
when STC is set to PV.
PV
Actual Delay Time
WZ (Wait Zone)
WZ
WTM (Wait Time)
Segment N Segment N+1 Segment N+2
Point of wait time release.
Shift to Segment_(n+1)
SP
PV
Fig 6: Wait Function Wait Time Release
Time
PD550 Series Nova Programmable Process and Temperature Controller Instruction Manual
27