Using the Local Control Interface
Overview
The Local Control Interface consists of 5 control keys and 4 LEDs. The control keys, if active, enable you to control the LTMR. Pressing a control key sends a signal to the LTMR to activate the associated function.
The 4 LEDs provide information about the LTMR state. These LEDs are driven from the LTMR and are not related to the LTMCU state.
Control Key Functions
The label on each of the control keys depends on the label set you have inserted (see Inserting the Local Control Interface Label).
 WARNING |
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UNINTENDED EQUIPMENT OPERATION
Proper labeling of the control keys must be validated.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
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Control keys 1 to 3 are used to control LTM R outputs O.1 and O.2. The function of control keys 1 to 3 depends on the motor operating mode. The following table lists their functions for each operating mode:
|
Operating Mode |
Assignment |
Key 1 |
Key 2 |
Key 3 |
|---|---|---|---|---|
|
Overload |
2-wire (maintained) |
No action |
No action |
No action |
|
3-wire (impulse) |
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|
Independent |
2-wire (maintained) |
Control motor (O.1) |
Control O.2 |
Stop motor (open O.1) and open O.2 while pressed |
|
3-wire (impulse) |
Start motor (close O.1) |
Close O.2 |
Stop motor (open O.1) and open O.2 |
|
|
Reverser |
2-wire (maintained) |
Forward run |
Reverse run |
Stop while pressed |
|
3-wire (impulse) |
Start motor forward |
Start motor reverse |
Stop motor |
|
|
Two-step |
2-wire (maintained) |
Control motor |
No action |
Stop while pressed |
|
3-wire (impulse) |
Start motor |
No action |
Stop motor |
|
|
Two-speed |
2-wire (maintained) |
Low speed control |
High speed control |
Stop while pressed |
|
3-wire (impulse) |
Low speed start |
High speed start |
Stop motor |
For more information about operating mode and output assignments, see the TeSys® T LTMR Motor Management Controller User’s Manual.
The functions of control keys 4 and 5 are stable and do not depend on the operating mode. The following table describes the functions of control keys 4 and 5:
|
Control Key |
Description |
|---|---|
|
Key 4 |
Switch between local and remote mode. |
|
Key 5 |
Reset the LTMR controller and clear all detected errors that can be reset. |
Active/Inactive Control Keys
Control keys 1 to 5 are active or inactive according to the selected active control source. The following table describes the state of control keys 1 to 5 for each case:
|
Control Key |
The LTMCU channel... |
|
|---|---|---|
|
is the active control source |
is not the active control source |
|
|
1 |
Active |
Inactive |
|
2 |
Active |
Inactive |
|
3 |
Active |
|
|
4 |
Depending on the value of the Control Remote Local Buttons Enable parameter:
|
|
|
5 |
Active |
|
LEDs
The following table describes each of the 4 LEDs:
|
LED |
When active, indicates that: |
Color |
|---|---|---|
|
A |
Output O.1 is active (see the functional description for control key 1 above) |
Red or green |
|
B |
Output O.2 is active (see the functional description for control key 2 above) |
Red or green |
|
C |
The active control source is the local source |
Amber |
|
D |
The active control source is the remote source |
Amber |
You can choose whether the LEDs A and B are red or green when active by setting the Run LED color parameter in the Services sub-menu. See HMI Setting.
Active Control Source
The LTMCU can be configured as the local or remote active control source.
-
The LTMCU is the active local control source when the parameter Control local channel setting is set to HMI.
-
The LTMCU is the active remote control source when the parameter Control remote channel setting is set to HMI.
-
The key 4 allows to switch between local and remote control mode if the logic input I.6 is ON and the parameter HMI remote local buttons enable is set to Yes.
The parameters are available from the sub-menu Control Settings / Remote/Local. See Remote/Local in the Control Setting Menu.
The table below indicates if the keys are active or not depending on the LTMCU active source status and the color of the Local / Remote LEDs:
|
If LTMCU is... |
and if... |
Then the keys are... |
|---|---|---|
|
the local active source |
LED C is ON (amber) |
active |
|
LED D is ON (amber) |
inactive |
|
|
the remote active source |
LED C is ON (amber) |
inactive |
|
LED D is ON (amber) |
active |
Example
The following example explains the meaning of LED C and D state to know whether keys 1 and 2 are active or not.
If the 2 following conditions are satisfied:
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Control local channel setting parameter is set to HMI (in this example: HMI = LTMCU)
-
I.6 input is active (for example in case of a strap between C and I.6 inputs on the LTMR plug-in terminal)
Then the HMI is the local control channel and keys 1 and 2 are active / inactive according to LED C and D state:
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LED C ON and LED D OFF means that the LTMCU is the active control source: keys 1 and 2 are active
-
LED C OFF and LED D ON means that the LTMCU is not the active control source: keys 1 and 2 are inactive.