GE Power Management
MDP Digital Time Overcurrent Relay
6-
9
GEK-100682D
6 MDP-LINK SOFTWARE
6
rings, especially if the phone system has a lot of delay in making the initial connection. Once a connection time
has been set, selecting the OK button with the left mouse button or the ALT-O hot key will store the new time-
out period. Selecting the CANCEL button will exit this item without any further action.
d) RELAY PARAMETERS
Relay parameters allows the communication parameters for a specific relay unit description to be changed or
viewed. An entry in the list must be selected first, by clicking on it with the mouse or using the UP and DOWN
ARROW keys to highlight the selection, and pressing the ENTER key.
Once a relay unit description has been picked, another window appears with the phone number, switch code,
baud rate, number of stop bits, parity, and the serial communications protocol for the selected relay unit
description. Any of the entry values may be selected by clicking on it with the mouse or using the TAB key to
move between the items, and then using the UP and DOWN ARROW keys to select the value for that item. To
exit the dialog box for that unit description, select either the OK button or the CANCEL button. The OK button
will accept the values in the dialog box and store them. Selecting the CANCEL button will exit the dialog box
and will use the values that were already present when the unit description was selected.
The user should note that once a unit description has been picked, there are no more hot keys available to
select items. The TAB key may be used to move from item to item, or the mouse may be used to select a spe-
cific item at any time.
To enter or change the phone number, select it by clicking on it with the left mouse button or use the TAB key to
move the cursor to the phone number box. The normal text editing keys may be used to enter or modify the
phone number. This is an optional item, and should only be filled in if MDP-LINK is using a modem for the unit
being described.
To enter or change the switch code, select it by clicking on it with the left mouse button or use the TAB key to
move the cursor to the switch code box. The normal text editing keys may be used to enter or modify the phone
number. This is an optional item, and should only be filled in if a code- operated switch is being used.
The baud rate must be set at 2400 baud. A choice of one stop bit must be made for communications to work
properly. The parity must be set to None.
The serial communications protocol depends on which MDP you have. If your model number is
MDP3XXXXXXCA then you must select RS485, however, if your model number is MDP4XXXXXXCA then you
must select RS232.
e) ADD RELAY TO LIST
Selecting this item will enable the user to add a unit description and the related values to the list of stored relay
unit descriptions. The user can either move the mouse cursor to the entry in the menu and click on the left
mouse button or use the hot key ALT-A to select this entry. Once the entry has been selected, the user is
prompted for a unit description. The description is limited to 20 characters. After the description has been
entered, the user can either click on the OK button with the left mouse button or use the ALT-O hot key to
accept it. (Selecting the CANCEL button will not add the new unit description and will exit the user from the
menu entry.)
After the new unit description has been accepted, a dialog box will appear with the phone number, switch code,
baud rate, stop bits, parity, and serial communications protocol items. Each item can be selected with the TAB
or SHIFT TAB key and a value chosen with the UP and DOWN ARROW keys, or a value can be chosen by
placing the mouse cursor over the desired value and clicking on the left mouse button.
f) DELETE RELAY FROM LIST
This item allows the user to delete a relay unit description from the configuration file. To select this item, either
click on it with the left mouse button or use the ALT-E hot key. Once this item has been selected, a dialog box
will be displayed containing a list box with all the relay unit descriptions and the OK and CANCEL buttons.
