Specifications

Error Messages Section 4-4

54 E RECV LEN.....................The length of the data received,

exceeded 64 bytes.

55 E

DEST...........................The destination in the telegram

from the PLC to the terminal

does not correspond to 0 (mas-

ter address).

Possible cause for the error:

- The SINEC L1 interface in the PLC is not accessed by the function

block FB201 exclusively (PLC-application program error).

56 E

DATA TYPE ...................An attempt was made to read a

data type which is not support-

ed by the function block FB201.

Possible causes for the error:

- Function block FB201 has been reduced in order to save memory

space and no longer supports all data types.

- Attempt to write-access inputs, timers or counters.

- Mask deﬁnition in the FLASH-EPROM contains errors.

4.5 SINEC L1-Data Handling Software for S5 115U

4.5.1 Installation

The interfacing of the operating terminals to the Simatic S5 115U via the PU-interface

by means of the SINEC L1 protocol requires the installation of the supplied data

handling software into the PLC. To install the software, carry out the following steps:

- The four supplied function blocks FB200, FB201, FB202 and FB203 must be

installed.

- A data block (L1DB) must be created in the RAM of the PLC. The minimum size

required for this data block is 77 data words. The data block can either be cre-

ated with the aid of the programming unit or through the start-up OBs. This

process must be carried out before one of the function blocks mentioned above

is executed for the ﬁrst time.

- FB200 must be executed through the start-up blocks OB21 and OB22. FB200

will parameterize the system data area for the SINEC L1 communication and

perform the required initialization of data in L1DB.

- FB201 must be executed through OB1. FB201 controls the data exchange with

the operating terminal. When necessary, it will execute FBs 202 or 203 for this

process. These two function blocks may not be executed directly by the applica-

tion software.

The function blocks use ﬂag words FW252 and FW254 as scratch ﬂags. This

means that if you wish to retain the information in the ﬂags, it will be necessary to

transfer the contents of these ﬂag words before the communications function

blocks are executed.