![](L1-3.gif) | Honeywell PML Handshaking Protocol | ![](L2-3.gif) |
- Honeywell PML uses a handshaking protocol similar to that of ADEPT
- Tokens on the bus have one of four values: idle, request, ack, busy
- Tokens change the state of the token by changing the state field of the utoken RECORD
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Copyright Honeywell, Inc. Reprinted with permission.