Mj-Xl Control Panel Automatic Mode; Summary Of Mj-Xl Control Modes - Siemens MJ-XL Installation And Operation Manual

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MJ-XL Control Panel Automatic Mode

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6 MJ-X Control Panel Automatic Mode
This Chapter covers operating principles of the MJ-X
trol program and describes the various functions per-
formed by the microprocessor. It contains the information
you may need when deciding between the various options
described in Chapter 4 (Setting Up the MJ-X
Panel) and Chapter 5 (Reading and Interpreting MJ-X
Control Panel Data).
6.1 Summary of MJ-X
Modes
The regulator control function has three operating modes:
local manual control, local automatic control, and remote
control. Manual control can only be performed locally.
Select the operating mode with the Remote/Auto/Manual
switch as shown in Figure 6.1.
Remote
(Enable)
Manual
(By-Pass
Position)
Remote/Auto/Manual Switch (Shown in
Figure 6.1
Local-Auto position)
Manual mode (By-Pass Position)
Place the Remote/Auto/Manual Switch in the Manual posi-
tion to activate the Manual mode. In Manual mode, you
Summary of Control Mode Operation
Table 6.1
Function/ Operation
Automatic Operation
Remote status contacts
(See Table K.3)
Manual status contacts
(See Table K.3)
Automatic Inhibit Output
contacts (See Table K.3)
Automatic Inhibit Input Active
Remote Auto Inhibit LED
Remote Raise Lower via
Terminal Block contacts
Comm Link
Raise/ Lower
Comm Link Automatic Inhibit
Tap Raise/Lower Switch
Operations
40
L
L
Control
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Control
Local-
Auto
(Local) Manual
Disabled
Open
Closed
Closed for "Auto Inhibit" Input
active
No effect
On for Terminal Block inhibit
active
Disabled
Disabled
Disabled
Enabled
con- can use the Tap Raise/Lower switch (on the MJ-X
panel) to control the tap position directly. Status informa-
tion is available via the remote communications link, but
the remote operator cannot change settings or otherwise
operate the MJ-X
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Local Automatic mode
Place the Remote/Auto/Manual Switch in the Local-Auto
position to activate the Automatic mode. In Local Auto-
matic mode, the MJ-X
algorithm. Status information is available via the remote
communications link, but the remote operator cannot
change settings or otherwise operate the MJ-X
Panel
Remote Automatic mode
Place the Remote/Auto/Manual Switch in the Remote
(Enable) position to enable the Remote mode. In Remote
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mode, the MJ-X
trol algorithms, unless overridden remotely. In this mode,
status information is available via the remote communica-
tions link. In addition, the remote operator can change set-
tings and remotely operate the control program, and tap
motor signals can be directly controlled via terminal strip
connections (see Figure 2.3).
Table 6.1 summarizes control program operation for the
three control modes.
(Local) Automatic
Local operation enabled; comm
link tap control & Terminal Block
override disabled.
Open
Open
Closed for "Auto inhibit" Input
active, and/or Comm link "auto
inhibit" active
Local, Comm link & Terminal
Block control inhibited; delay
timer held cleared.
On for Terminal Block inhibit
active
Disabled
Disabled
Disabled
Disabled
Siemens Power Transmission & Distribution, Inc.
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Control Panel.
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executes its normal tap control
executes its normal (automatic) tap con-
Remote
Enabled w/ Comm link tap
control override & Terminal
Block override
Closed
Open
Closed for "Auto Inhibit" Input
active, and/or Comm link "auto
inhibit" active
Local Auto & Comm link tap
control inhibited; Terminal Block
control enabled
On for Comm link or Terminal
Block inhibit active
Enabled
Enabled
Per remote command
Disabled
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front
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Control