PI MS249E - Page 212

8 GCS Commands
206 Version: 1.2.1 MS249E C-863.12 Mercury Controller
Note: If the current parameter values are incorrect, this
can cause a fault in the system. Make sure that the
parameter settings are correct before you execute the
WPA command.
RAM settings not saved with WPA will be lost when the
controller is switched off or rebooted or when RPA (p.
184) is used to restore the parameters.
You can obtain a list of all available parameters with HPA?
(p. 159).
Use SPA? (p. 190) to check the current parameter settings
in volatile memory.
See SPA (p. 190) for an example.
Format:
WPA <Pswd> [{<ItemID> <PamID>}]
Arguments:
<Pswd> is the password for writing to the nonvolatile
memory. See below for details.
<ItemID> is the element for which a parameter is to be
saved from the volatile to the nonvolatile memory. See
below for details.
<PamID> is the parameter identifier, can be written in
hexadecimal or decimal format. See below for details.
Response:
None
Troubleshooting:
Illegal element identifier, wrong parameter ID, invalid
password
Notes:
Parameters can be changed in volatile memory with SPA
(p. 190), ACC (p. 129), DEC (p. 140), and VEL (p. 203).
When WPA is used without specifying any arguments
except the password, the currently valid values of all
parameters affected by the specified password are saved.
Otherwise only one single parameter can be saved per
WPA command.
Note that the number of write cycles in the nonvolatile
memory is limited. Write default settings only if
necessary.
Valid passwords:
The password for writing to the nonvolatile memory is
"100".