Entry type: FAQ, Entry ID: 17471776, Entry date: 11/06/2003
(0)
Rate

Possible baud rates for S7-400 PtP communication

  • Entry
  • Associated product(s)

QUESTION:
Does the maximum transfer rate of the S7-400 PtP CPs depend on the MLFB?

ANSWER:
In some S7-400 PtP CPs the maximum transfer rate does depend on the MLFB of the CP.

The following table lists the maximum transfer rates of the S7-400 PtP CPs.

Module

MLFB

ASCII
driver

3964(R)

RK 512

Printer driver

CP 440

6ES7 440-
1CS00-0YE0

300 - 115200
bit/s

300 -115200
bit/s

--

--

CP 441-1

6ES7 441-
1AA00-0AE0

--

300 - 38400
bit/s (1)

--

--

CP 441-1

6ES7 441-
1AA01-0AE0

300 - 38400
bit/s (1)

300 - 38400
bit/s (1)

--

300 - 38400
bit/s (1)

CP 441-1

6ES7 441-
1AA02-0AE0

300 - 38400
bit/s (1)

300 - 38400
bit/s (1)

--

300 - 38400
bit/s (1)

CP 441-1

6ES7 441-
1AA03-0AE0

300 - 38400
bit/s (1)

300 - 38400
bit/s (1)

--

300 - 38400
bit/s (1)

CP 441-2

6ES7 441-
2AA00-0AE0

--

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

--

CP 441-2

6ES7 441-
2AA01-0AE0

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

CP 441-2

6ES7 441-
2AA02-0AE0

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

300 - 76800
bit/s (1)

CP 441-2

6ES7 441-
2AA03-0AE0

300 - 115200
bit/s (1),(2)

300 - 115200
bit/s (1),(2)

300 - 115200
bit/s (1),(2)

300 - 76800
bit/s (1)

Table 1: Transfer rates of S7-400 PtP CPs

(1) With 20 mA TTY interface only 300 -19200 bit/s is possible
(2) Sum baud rate max. 115200 bit/s

Note:
With CP441-2 (6ES7 441-2AA03-0AE0) the maximum permissible transfer rate of both interfaces is in sum 115200 bit/s.