Yaskawa P7 Metasys N2 - Manual (Page 21)

Network Connection 3-3
P7U Drive Functions
Each of the following functions must be enabled during start-up of the Drive:
Start and stop the drive
Set the RUN FORWARD COMMAND (BO 1) to run the drive in the forward direction. Set the RUN REVERSE COMMAND
(BO 2) to run the drive in the reverse direction. RUN/STOP MONITOR (BI 1) shows the current run status of the drive.
FORWARD/REVERSE MONITOR (BI 2) shows the current direction.
CAUTION
Improper drive direction may damage HVAC equipment if parameter b1-04, Reverse Enable, is
improperly set (b1-04 = 0).
Lock the P7U panel
Locking the panel prevents the user from using the RUN and STOP keys locally at the drive panel. PANEL LOCK (BO 10) can
be commanded to lock and unlock the panel.
Digital Inputs
MULTI-FUNCTION INPUT 1 (BO 5) through MULTI-FUNCTION INPUT 5 (BO 9) are physical digital inputs on the drive.
They can be set either by external devices, such as limit or pressure switches, or by the network. Their function depends on how
the drive has been programmed. Refer to the P7U User’s Manual section on Multi-Function Inputs (H1-01 through H1-05) for
detailed information on the use and programming of the multi-function inputs. The multi-function input status can be monitored
through MULTI-FUNCTION INPUT 1 MONITOR (BI 14) through MULTI-FUNCTION INPUT 5 MONITOR (BI 19). The
MULTI-FUNCTION INPUT # MONITOR state is the logical OR of the serial command value (BO 5 through BO 9) and the state
of the external connection.
CAUTION
Because the multi-function inputs can be set by both external devices or over the network, care must
be taken when connecting the multi-function inputs to external devices to ensure correct system
operation.
Digital Outputs
MULTI-FUNCTION OUPUT 1 (BI 10) through MULTI-FUNCTION OUPUT 3 (BI 12) are physical digital outputs on the drive.
Their function depends on how the drive has been programmed. Refer to the P7U User’s Manual section on Multi-Function
Outputs (H2-01 through H2-03) for detailed information on the use and programming of the multi-function outputs.
Loop gain
PI PROPORTIONAL GAIN (AO 4) and PI INTEGRAL TIME (AO 5) are the gain and integral time parameters used by the P7U.
The P7U PI loop is structured differently than the Metasys loop. Refer to the P7U User’s Manual section on PID for information
on how the P7U PI loop functions.
Reading and resetting faults
FAULT MONITOR (BI 4) and DRIVE READY MONITOR (BI 3) show the current status of the drive. FAULT CODE (AI 10)
contains the code for the most current fault. LST FLT CODE (AI 19) contains the code for the previous fault. See table below for
descriptions of the fault codes. The drive fault can be reset through FAULT RESET COMMAND (BO 4)
. The FAULT RESET
COMMAND is only available when the RUN FORWARD COMMAND and the RUN REVERSE COMMAND are both OFF.