Unidrive M400 User Guide
65
Issue Number: 2
5.8.2 Changing the User Security Level /Access
Level
The security level is determined by the setting of Pr
00.010
or Pr
11.044
.
The Security Level can be changed through the keypad even if the User
Security Code has been set.
5.8.3 User Security Code
The User Security Code, when set, prevents write access to any of the
parameters in any menu.
Setting User Security Code
Enter a value between 1 and 9999 in Pr
00.025
and press the
button; the security code has now been set to this value. In order to
activate the security, the Security level must be set to desired level in
Pr
00.010
. When the drive is reset, the security code will have been
activated and the drive returns to Menu 0 and the
symbol is displayed
in the right hand corner of the keypad display. The value of Pr
00.025
will
return to 0 in order to hide the security code.
Unlocking User Security Code
Select a parameter that need to be edited and press the
button,
the display will now show ‘security 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 following message ‘incorrect
security code’ is displayed, and the display will revert to parameter view
mode.
Disabling User Security
Unlock the previously set security code as detailed above. Set Pr
00.025
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.
5.9 Displaying parameters with non-
default values only
By selecting 'Show non-default' in Pr
mm.000
(Alternatively, enter 12000
in Pr
mm.000
), 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
mm.000
and select 'No action' (alternatively enter a value of 0).
Please note that this function can be affected by the access level
enabled, refer to section 5.8
Parameter access level and security
page 64 for further information regarding access level.
5.10 Displaying destination parameters only
By selecting 'Destinations' in Pr
mm.000
(Alternatively enter 12001 in
Pr
mm.000
), 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
mm.000
and select 'No action' (alternatively enter a value of 0).
Please note that this function can be affected by the access level
enabled, refer to section 5.8
Parameter access level and security
page 64 for further information regarding access level.
5.11 Communications
Fitting an AI-485 adaptor provides the drive with a 2 wire 485 serial
communications interface. This enables the drive set-up, operation and
monitoring to be carried out with a PC or controller as required.
5.11.1 485 Serial communications
Communication is via the RJ45 connector or screw terminals (parallel
connection). The drive only supports Modbus RTU protocol.
The communications port applies a
1
/
4
unit
load to the communications
network.
USB to EIA485 Communications
An external USB hardware interface such as a PC cannot be used
directly with the 2-wire EIA485 interface of the drive. Therefore a
suitable converter is required.
A suitable USB to EIA485 isolated converter is available from Control
Techniques as follows:
•
CT USB Comms cable (CT Part No. 4500-0096)
When using one of the above converters or any other suitable converter
with the drive, it is recommended that no terminating resistors be
connected on the network. It may be necessary to 'link out' the
terminating resistor within the converter depending on which type is
used. The information on how to link out the terminating resistor will
normally be contained in the user information supplied with the
converter.
Serial communications set-up parameters
The following parameters need to be set according to the system
requirements.
Serial communications set-up parameters
Serial Mode
(11.024)
8 2 NP (0),
8 1 NP (1),
8 1 EP (2),
8 1 OP (3),
8 2 NP M (4),
8 1 NP M (5),
8 1 EP M (6),
8 1 OP M (7),
7 1 EP (8),
7 1 OP (9),
7 1 EP M (10),
7 1 OP M (11)
The drive only supports the
Modbus RTU protocol and is
always a slave. This parameter
defines the supported data
formats used by the 485
comms port (if installed) on the
drive. This parameter can be
changed via the drive keypad,
via a option module or via the
comms interface itself.
Serial Baud Rate
(11.025)
300 (0),
600 (1),
1200 (2),
2400 (3),
4800 (4),
9600 (5),
19200 (6),
38400 (7),
57600(8),
76800(9),
115200 (10)
This parameter can be changed
via the drive keypad, via a
option module or via the
comms interface itself. If it is
changed via the comms
interface, the response to the
command uses the original
baud rate. The master should
wait at least 20 ms before
sending a new message using
the new baud rate.
Serial Address
(11.023)
1 to 247
This parameter defines the
serial address and an
addresses between 1 and 247
are permitted.
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