CTI Janus Programmable Automation Controller IOG
17
2.7
External SD Card Slot
The front panel contains a receptacle for a full-size SD card. Standard (SD) and high capacity (SDHC) memory cards
may be used. This SD card is not required for controller operation, and no logic instructions will access (read or
write data) from this card. A bicolor
S
TATUS
LED, mounted in the front panel indicates the following conditions:
•
OFF: No SD card is inserted
•
GREEN: An SD card is inserted into the receptacle but it is not being accessed by the controller firmware.
When this condition exists, the card can be removed.
•
RED: The firmware is accessing the SD card (reading or writing). When this condition exists, you should
not remove the card. Removing the card will corrupt the data on the card.
This card has three primary uses as described below:
a)
SD Card Ethernet Port Setup
provides a method for the user to specify a fixed IP Address when the
controller has not been configured (i.e. on initial power-up or after configuration reset). This operation
executes only if Module Switch 2 = OPEN and Module Switch 4 = CLOSED. See SD Card Ethernet Port
Setup 3.2.9 for more information.
b)
SD Card Firmware Update
provides an alternate method for firmware update when
Remote Firmware
Update
is not allowed or connection from
Janus Workbench
is inconvenient. The
SD Card Firmware
Update
method is initiated on startup when Module DIP Switch 2 is set to CLOSED position. See
Panel SD Card Firmware Update for additional information.
c)
File Operations
allows you to transfer files between the internal SD card and the external SD card and/or
PC. For example, you could use this facility to backup controller system and/or application files while the
application is running. These operations can be selected via the web server
File Management
page.
2.8
Clear Exception Pushbutton
When enabled, the
C
LEAR
E
XCEPTION
pushbutton provides a direct method to clear exceptions, reset controller
configuration values to default values, or restore factory defaults without requiring access to
Janus Workbench
or
the controller web server. See
NOTE
The recessed pushbutton will function only when Switch 3 is in the CLOSED position.
Section 3.2.3 Setting the Module Switches
