Displaying Parameters With Non-Default Values Only; Displaying Destination Parameters Only; Communications - Emerson Digitax ST User Manual

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5.6.8 User Security
The User Security, when set, prevents write access to any of the
parameters (other than Pr. 0.49 and Pr 11.44 Access Level) in any
menu.
User security open - All parameters: Read / Write access
Pr 0.00 Pr 1.00 ............
Pr 0.01 Pr 1.01 ............
Pr 0.02 Pr 1.02 ............
Pr 0.03 Pr 1.03 ............
............
............
Pr 0.49 Pr 1.49 ............
Pr 0.50 Pr 1.50 ............
User security closed - All parameters: Read Only access
(except Pr
Pr 0.00 Pr 1.00 ............
Pr 0.01 Pr 1.01 ............
Pr 0.02 Pr 1.02 ............
Pr 0.03 Pr 1.03 ............
............
............
Pr 0.49 Pr 1.49 ............
Pr 0.50 Pr 1.50 ............
Setting User Security
Enter a value between 1 and 999 in Pr 0.34 and press the
the security code has now been set to this value. In order to activate the
security, the Access level must be set to Loc in Pr 0.49. When the drive
is reset, the security code will have been activated and the drive returns
to Access Level L1. The value of Pr 0.34 will return to 0 in order to hide
the security code. At this point, the only parameter that can be changed
by the user is the Access Level Pr 0.49.
Unlocking User Security
Select a read write parameter to be edited and press the
display will now show CodE. Use the arrow buttons to set the security
code and press the button.
With the correct security code entered, the display will revert to the
parameter selected in edit mode.
If an incorrect security code is entered the display will revert to
parameter view mode.
To lock the User Security again, set Pr 0.49 to Loc and press the
reset button.
Disabling User Security
Unlock the previously set security code as detailed above. Set Pr 0.34 to
0 and press the button. The User Security has now been disabled,
and will not have to be unlocked each time the drive is powered up to
allow read / write access to the parameters.
46
Electrical Getting Basic
installation started parameters
Pr 21.00 Pr 22.00
Pr 21.01 Pr 22.01
Pr 21.02 Pr 22.02
Pr 21.03 Pr 22.03
Pr 21.30 Pr 22.28
Pr 21.31 Pr 22.29
0.49 and Pr 11.44 )
Pr 21.00 Pr 22.00
Pr 21.01 Pr 22.01
Pr 21.02 Pr 22.02
Pr 21.03 Pr 22.03
Pr 21.30 Pr 22.28
Pr 21.31 Pr 22.29
button;
button, the
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5.7 Displaying parameters with non-
default values only
By entering 12000 in Pr xx.00, the only parameters that will be visible to
the user will be those containing a non-default value. This function does
not require a drive reset to become active. In order to deactivate this
function, return to Pr xx.00 and enter a value of 0.
Please note that this function can be affected by the access level
enabled, refer to section 5.6.7 Parameter access level and security for
further information regarding access level.
5.8

Displaying destination parameters only

By entering 12001 in Pr xx.00, the only parameters that will be visible to
the user will be destination parameters. This function does not require a
drive reset to become active. In order to deactivate this function, return
to Pr xx.00 and enter a value of 0.
Please note that this function can be affected by the access level
enabled, refer to section 5.6.7 Parameter access level and security for
further information regarding access level.
5.9

Communications

5.9.1 Introduction
The Digitax ST has a standard 2-wire EIA485 interface (serial
communications interface) which enables all drive set-up, operation and
monitoring to be carried out with a PC or PLC if required. Therefore, it is
possible to control the drive entirely by serial communications without
the need for a -keypad or other control cabling. The Digitax ST supports
two protocols selected by parameter configuration:
• Modbus RTU
• CT ANSI
Modbus RTU has been set as the default protocol, as it is used with the
PC-tools set-up software as provided on the CD ROM.
The communications port of the drive is a RJ45 socket, and is isolated
from the power stage and the other control terminals.
The communications port applies a 2 unit load to the communications
network.
USB/EIA232 to EIA485 Communications
An external USB/EIA232 hardware interface such as a PC cannot be
used directly with the 2-wire interface of the drive. Therefore a suitable
converter is required.
Suitable USB to EIA485 and EIA232 to EIA485 isolated converters are
available from Control Techniques as follows:
• CT USB Comms cable (CT Part No. 4500-0096)
• CT EIA232 Comms cable (CT Part No. 4500-0087)
When using one of the above converters or any other suitable converter
with the Digitax ST, it is recommended that no terminating resistors be
connected on the network. It may be necessary to 'jumper out' the
terminating resistor within the converter depending on which type is
used. The information on how to jumper out the terminating resistor will
normally be contained in the user information supplied with the
converter.
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