Manual VIPA CPU 21x Chapter 9 Deployment CPU 21xSER-1
HB103E - Rev. 05/45 9-11
At ASCII protocol, this parameter is ignored.
At STX/ETX, 3964R, USS and Modbus you fix here a DB that contains the
communication parameters and has the following structure for the
according protocols:
Data block at STX/ETX
DBB0: STX1 BYTE (1. Start-ID in hexadecimal)
DBB1: STX2 BYTE (2. Start-ID in hexadecimal)
DBB2: ETX1 BYTE (1. End-ID in hexadecimal)
DBB3: ETX2 BYTE (2. End-ID in hexadecimal)
DBB4: TIMEOUT WORD (max. delay time between 2 tele-
grams in a time window of 10ms)
Note!
The start res. end sign should always be a value <20, otherwise the sign is
ignored!
Data block at 3964R
DBB0: Prio BYTE (The priority of both partners must be
different. Prio 0 and 1 are possible)
DBB1: ConnAttmptNr BYTE (Number of connection trials)
DBB2: SendAttmptNr BYTE (Number of telegram retries)
DBB4: CharTimeout WORD (Char. delay time in 10ms time window)
DBB6: ConfTimeout WORD (Ackn. delay time in 10ms time window)
Data block at USS
DBB0: Timeout WORD (Delay time in 10ms time grid)
Data block at Modbus-Master
DBB0: Timeout WORD (Respond delay time in 10ms time grid)
Data block at Modbus-Slave
DBB0: Address BYTE (Address 1...247 in the Modbus network)
DBB2: Timeout WORD (Respond delay time in 10ms time grid)
Parameter (as DB)
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