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5–7
5.1.8 – Bit Masks
Some parameters can also be addressed via the appropriate Bit Parameter, instead of or as well as
being accessed via the more commonly used menus. These Bit Parameters can only be accessed
by the ‘Parameters’ menu, i.e., the menu path for the Auto Config Bit Parameter would be:
‘Stopped & ready’ --> ‘Parameters’ --> ‘P1 to P20’ --> ‘P18 Auto Config’. The user would then see
a display similar to the one below:
A cursor would be flashing at the character on the display which represents the Least Significant
Bit (LSB, also known as bit 0, i.e., the 0 or 1 on the right hand side of the eight 0’s and/or 1’s). This
character is actually underlined for clarity in the example above.
The cursor represents the user’s current input point, and the value of the bit highlighted by the
cursor can now be changed. To move the cursor one place to the left, the user needs to press the
OPTIMISE key, and the user will then be able to edit bit 1. Pressing the OPTIMISE key repeatedly
will continue to move the cursor one place to the left until bit 7, or the Most Significant Bit (MSB;
the 0 or 1 on the left of the eight 0’s and/or 1’s) is reached, after which pressing the OPTIMISE
button again will wrap the cursor around to bit 0.
To continue with the example, let us suppose that the user wishes to enable the ‘Auto Pedestal’ (bit
7) and disable the ‘Auto Bypass’ (bit 2). The user should first press the OPTIMISE button twice to
move the cursor two places to the left to bit 2. Then to change the value of bit 2 from “1” to “0”,
the user would simply press the
쑼
key once. To move the cursor to the ‘Auto Pedestal’ bit (bit 7),
the user would now press the OPTIMISE button five times. Then to turn on the ‘Auto Pedestal’ bit,
just pressing the
쑿
key once will change the bit to the required value. To confirm the changes
made, the user would then press the ENTER button. Not pressing ENTER would effectively cancel
the changes made by the user.
5.1.9 – Keypad Boot-up Messages
When the control supply to the SR44 is switched on, the user interface will go through a boot-up
procedure during which it will display some information relevant to the SR44’s current state. The
messages are displayed during the boot-up procedure in the order that they are listed below. (A
brief explanation of each message is included.)
‘V1.069LM
10/12/16’ This message shows the keypad firmware version number and release date
(date displayed in European format; YY/MM/DD).
‘1 Find Starter’
This message indicates that the keypad is looking for a Soft Starter, starting with a station
number of “1”. If it is unable to find a starter with that station number, it will move on to
station number 2, etc., until 32, (the highest valid station number) is reached.
See section 5.3.4 for further details.
‘Password is Set’ This message appears if the password has been set.
‘Stopped & ready
1:’ ‘Stopped and ready’ is displayed after the end of a successful boot-up procedure. The number
on the second line is the station number of the unit that the keypad is currently talking to.
Parameter Name:
P18 Auto Config
00000110 Flags
Bit Data:
Bit Number: 7_ _ _ _ _ _0
Note: Only the text shown in the shaded box would actually be displayed by the user interface.
Chapter 5: Keypad Menu Items and Parameters
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019