Specifications

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12.4 Remote Wakeup Function
[ 1 ] Outline
The remote wakeup function allows you to turn the BHT on and run the specified user program
(hereafter referred to "remote wakeup program") from a remote location by sending the speci-
fied message from the host computer to the BHT via the CU.
Developing user programs utilizing the remote wakeup at both the host computer and BHT
enables you to automatically maintain the master system or update user programs.
To use the remote wakeup between the BHT and host computer, the following is required:
• Optical communications unit CU-7001
• CU interface cable
[ 2 ] Remote wakeup operation
■ Typical operation flow
At the host computer
(1) Send one character to the BHT.
(2) Wait for approx. 100 ms until the BHT wakes up from a sleep.
(3) Send a "WAKE" character string to the BHT.
(4) Wait for a response from the BHT.
- If the host receives "ACK + 0 + ID":
The host should conduct transactions with the remote wakeup program in the BHT.
- If the host receives "ACK + 1 + ID" or "ACK + 2 + ID":
The host should proceed to the corresponding error processing.
If the host receives no response from the BHT, go back to step (1).