(Pur) Push Refresh; (Puc) Push Clear - Symetrix Composer v7.0 Manual

If the command is accepted, the unit will respond with a list
of enabled controller numbers separated by <CR>. If no
controllers are enabled, it returns the string:
If the command is interpreted but fails for any reason the unit
will respond with the string:
Special case: Entering GPU 0<CR> will return a list settings
related to push. It begins with Global=<0/1> to show if push
is globally enabled (1) or disabled (0).
This is followed by five 5-digit values showing the settings of
1) the global lower limit,
2) the global upper limit,
3) the threshold for parameters,
4) the threshold for meters, and
5) the push interval in milliseconds.
The default printout would look like this:
Global=1<CR>
00001 10000 00001 00001 00100<CR>

(PUR) Push Refresh

This command causes data to be pushed immediately even
if it hasn't changed (assuming push is enabled). This may
be useful when trying to synchronize a control system to the
unit. A range of controllers can be specified to refresh only
certain values. The syntax of the command is:
PUR [<LOW> [<HIGH>]]<CR>
Where <LOW> is the optional lowest controller number
to refresh and <HIGH> is the optional highest controller
number to refresh. <LOW> and <HIGH> are both decimal
controller numbers (1-10000) assigned in Composer. If no
controller numbers are specified, the entire range of 1-10000
will be refreshed. If only one controller number is specified,
it is assumed to be the <LOW> value and the range from
that number up to 10000 will be refreshed. If two controller
numbers are specified, the range formed by those values
(including the values themselves) will be refreshed. <LOW>
must be less than or equal to <HIGH>.
If the command is accepted, the unit will respond with the
string:
If the command is interpreted but fails for any reason the unit
will respond with the string:
At power-on, all controller values are assumed to have
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ACK<CR>
NAK<CR>
ACK<CR>
NAK<CR>
Commands Related to Push
changed, so it acts as if a full refresh was performed.
Remember that individual controller numbers must have
the Enable Push setting active in Composer. In addition,
push must be enabled for the range of controllers you are
refreshing (see Push Enable/Disable). Controller numbers
that don't meet this criterion will not be affected by the Push
Refresh command. In other words, if a controller is not
enabled for push, refreshing it won't cause the value to be
pushed even if that controller is later enabled. The controller
must be enabled for push at the time the Push Refresh
command is issued.

(PUC) Push Clear

This command causes previous changes in data to be
ignored and not pushed. It may be desirable to issue
this command when first enabling push to prevent being
swamped by the flood of incoming data. A range of
controllers can be specified to clear only certain values. The
syntax of the command is:
PUC [<LOW> [<HIGH>]]<CR>
Where <LOW> is the optional lowest controller number to
clear and <HIGH> is the optional highest controller number
to clear. <LOW> and <HIGH> are both decimal controller
numbers (1-10000) assigned in Composer. If no controller
numbers are specified, the entire range of 1-10000 will
be cleared. If only one controller number is specified, it
is assumed to be the <LOW> value and the range from
that number up to 10000 will be cleared. If two controller
numbers are specified, the range formed by those values
(including the values themselves) will be cleared. <LOW>
must be less than or equal to <HIGH>.
If the command is accepted, the unit will respond with the
string:
If the command is interpreted but fails for any reason the unit
will respond with the string:
It may be useful to issue this command if push has been
disabled for a long time and then is about to be re-enabled.
Otherwise, you will immediately receive notification for all
changes that occurred during the disabled time.
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ACK<CR>
NAK<CR>