Yokogawa YVP20S - Manual (Page 113)

11-2
<Toc> <Ind> <11. PID BLOCK SERVICES>
IM 21B04C50-01E
11.1 States and Modes
The permitted states of the PID block are:
• RCas selected by the R button. In this mode, the setpoint of the PID block is set by a
remote application that writes to the RCAS_IN parameter regularly. This mode is
allowed only if a remote application is “soft-wired” to the RCAS_IN parameter of the
PID block.
• Cas selected by the C button. In this mode, the setpoint of the PID block is set by a
Foundation fieldbus function block. This mode is allowed only if a Foundation fieldbus
function block OUT is “soft-wired” to the CAS_IN parameter of the PID block, and
scheduled.
• Auto selected by the L button. In this mode, the setpoint of the PID block is set by the
setpoint slider or the setpoint text box.
• Man selected by the M button. In this mode, the output of the PID is set by the output
slider or the output text box. The PID algorithm is not processed in Man.
• Simulate selected by the SIM. Button. The ValveNavi user must have the permission
level 8 (training level).
Note that Simulate should never be used with a device that is connected to a real process.
Simulate will destroy any existing control linkages. See 11.3 before actually using this
function.
• Other (usually IMan or OOS) indicated by Other button. This button is an indicator
only. It will not change the mode of the PID block.