MAINTAINING THE CONTROLLER
SNAP PAC S-Series User’s Guide
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background downloading, and run the new strategy if you set it to autorun. If it’s not set to
autorun, you can start the strategy manually.
b.
Put the card in while the controller is running.
The controller will check that the
stratregy differs from the existing one, verify signature on an .ssd file, load the strategy, burn
it to flash if you told it to, switch to the new strategy if you’re using background
downloading, and then run the strategy only if the existing strategy was running when you
put the card in. If the existing strategy was stopped, the new one will not run; you can start
it manually.
In either case, the STAT LED will blink steadily while the strategy is loading and then blink three
times—green to indicate success, or red to indicate failure.
8.
When the STAT LED no longer blinks steadily, but blinks only once every five seconds, remove
the card.
Disabling or Enabling Firmware and Strategy Updates Via the Card
If you do not want anyone to be able to update firmware or strategies using a microSD card, you can
disable this feature in the controller.
1.
In PAC Manager, open the Inspect window for the controller.
2.
Click Other and choose Generic Read/Write from the popup menu.
3.
In the Address field, type F7002200. Choose 32-bit Integer as the Type.
4.
To disable firmware/strategy updates: In the Value column next to the address, type
0
(zero).
Click Refresh.
5.
To enable firmware/strategy updates: In the Value column, type any value other than zero.
Setting Time and Date
The SNAP PAC S-series controller’s built-in clock is set at the factory. To change the time and date, see
the instructions in the
PAC Manager User’s Guide.
STAT LED Blink Codes
The STAT LED on the top of the SNAP PAC S-series controller uses blink codes to indicate controller
operation and status conditions. The blink codes can be useful during operation and in
troubleshooting. When the STAT LED is on and remains green, it indicates that a flowchart is running
and a user task is being executed. When the STAT LED is on and remains orange, it indicates that the
controller is running, but no flowchart is running.
Different blink codes can occur in sequence. For example, two fast green blinks followed by three
slow red blinks show the firmware loading at startup followed by a firmware error.
