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Activation/Deactivation from a Host
This section describes the results of power ON/OFF commands from a host
connected to the 3746 via the external power off (EPO) cable. Results may differ,
depending on whether the power mode is local or remote.
Power ON Command
Make sure the Standby light is ON, but not blinking.
When the host generates a Power ON command, the 3746 is inactivated in local
mode, and activated in remote mode.
The Ready light blinks and stays ON.
If an error occurs, call the IBM representative (see "Solving Problems" on
page 1-5).
Power OFF Command
The Ready light must be ON, but not blinking.
When the host generates a Power OFF command, the following occurs:
The Standby light begins to blink and then goes ON.
If an error occurs, call the IBM representative (see "Solving Problems" on
page 1-5).
VTAM Remote Power OFF Command
A remote power OFF (RPO) command can be sent to a remote 3745 and attached
3746 from VTAM. The remote 3746 powers OFF only if the following applies:
B-8
3746-950: User's Guide
If there are errors, see the Display Alarms function, or online help for
more information.
The 3746 stays active in local mode.
In remote mode:
– 3746 stays active if the following applies:
- 3745 is powered ON.
- Service processor requests activation (see "Activation" on page B-7).
- Power ON command is generated by another host connected to the
3746 via an EPO cable.
– The 3746 is deactivated if the following applies:
- 3745 is powered OFF.
- Service processor requests deactivation (see "Deactivation" on
page B-7).
- No power ON commands from other hosts connected to the 3746 via
EPO cable.
3745 Power Control is in a network mode
3746 Power Control is in remote mode
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