SCH2 Technical Manual TSP016.doc Issue 3.0 – January 2005
Money Controls 2005. All rights reserved.
Page 32 of 61
16.1 Commands in Detail
All byte values shown in [ decimal ] unless otherwise stated.
Header 254: Simple poll
Transmitted data :
<none>
Received data :
ACK
This is a good command to use to confirm that a device is plugged into the expected
address, powered-up and operating correctly. A total of 5 bytes are sent to the hopper which
then replies with 5 bytes.
Header 253: Address poll
Transmitted data :
<none>
Received message : {variable delay} <slave address byte>
Only a single byte is returned by the hopper rather than a full ccTalk message packet.
See the ccTalk generic specification for more details.
Header 252: Address clash
Transmitted data :
<none>
Received message : {variable delay} <slave address byte>
Only a single byte is returned by the hopper rather than a full ccTalk message packet.
See the generic specification for more details.
Header 251: Address change
Transmitted data :
[ address ]
Received data :
ACK
The address specified overrides that determined by the connector wiring loom. The new
value is lost at power-down or reset.
Header 250: Address random
Transmitted data :
<none>
Received data :
ACK
The address is randomly set to a value between 3 and 255. The broadcast address 0, the
default bus master address 1, and the default coin acceptor address 2, are automatically
avoided for your convenience. The new value is lost at power-down or reset.
Summary of Contents for SCH2
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