Siemens SIMATIC VPU200/560 Programming Manual page 114

Accessing Support Functions (continued)
9-10 Using VPU200 Support Functions
Function 21: Function 21 ("Run Remote Base Diagnostics") allows you to
run diagnostics on the I/O bases. You may select a particular channel and
base for running the diagnostics, or you may choose to run the diagnostics
on all channels and bases. When the function is started, a prompt appears
to ask you if you are sure. If you press the NO (F1) function keys the
operation aborts, and the Support Function menu is displayed. If you press
the YES (F2) function key, the diagnostics begin. When the checks are
complete the channels and bases are displayed with a "Diagnostics Passed"
message or an error message indicating the failure(s). The function key
labels change to EXIT (F1) and CONTINUE (F2). The EXIT function key
terminates the operation; the CONTINUE key shows the next display of
channels and bases (if any).
Function 25: Function 25 ("Display Failed I/O") will cause the system to
assess the status of all I/O modules attached to the system. ft will then
display in chart format the location (in the order of Channel, Base, and Slot)
of any failed I/O modules. Also the following function keys will appear at the
bottom of the screen:
If the list of failed I/O modules is too long to fit on one screen, the
CONTINUE (F2) function key will place the next page of failed I/O modules
on the screen. When you wish to leave this function, pressing the EXIT (F1)
function key terminates the function and returns the support menu to the
screen. Note that this function works only for those modules which set the F
(failure) bit. To determine if a particular module does set the F bit, check
the manual that accompanies the module.
SIMATIC VPU200/560 Programming Manual