96
10. Appendix C: Default Configuration
10.2. Content of the Gateway’s DPRAM Memory
The LUFP7 gateway’s DPRAM memory contains all of the data exchanged between the gateway and the
8 TeSys U motor starters, as well as two special registers only exchanged between the gateway and the
Profibus-DP master (words used for managing the downstream Modbus network).
The flow of data exchanged between the TeSys U motor starters, the gateway and the Profibus-DP master is
shown below, in order to highlight the role of the gateway’s memory in these exchanges:
TeSys U motor starters

j

e

d

c

OUTPUT data
memory zone
INPUT data
memory zone
LUFP7 Gateway
Modbus
Outputs
Inputs
Profibus-DP
Outputs
Inputs
Profibus-DP master
(TSX 57353 + TSX PBY 100)
N.B.: The total number of input and output bytes should be less than or equal to 416 bytes. It is therefore not
possible to configure both the maximum number of input bytes and the maximum number of output bytes, which
are both equal to 244 bytes.
10.2.1. Input Data Memory Area
The gateway has 244 input bytes. Only the first 32 bytes are used. Byte 12#0012 is used for adjusting the
following 16-bit data, so that they can be aligned on even addresses, and for obtaining a total size of 32 input
bytes. One should therefore configure only one 32-byte input/output module using a Profibus-DP configuration
device such as SyCon.
Service Address Size Description
Managing the downstream Modbus network 16#0000 1 word Gateway status word
16#0002 1 word Value of the motor starter c status register
16#0004 1 word Value of the motor starter d status register
16#0006 1 word Value of the motor starter e status register
16#0008 1 word Value of the motor starter f status register
16#000A 1 word Value of the motor starter g status register
16#000C 1 word Value of the motor starter h status register
16#000E 1 word Value of the motor starter i status register
Periodic communications
—
Monitoring of
TeSys U motor starters
16#0010 1 word Value of the motor starter j status register
—— 16#0012 1 byte Free memory location
16#0013 1 byte Slave no. (16#01 to 16#08)
16#0014 1 byte Function number (16#03)
16#0015 1 byte Number of bytes read (16#02)
Aperiodic communications
—
Reading the value of a
motor starter parameter
(RESPONSE)16#0016 1 word Value of the parameter read (16#xxxx)
16#0018 1 byte Slave no. (16#01 to 16#08)
16#0019 1 byte Function number (16#06)
16#001A 1 word Address of the parameter written (16#xxxx)
Aperiodic communications
—
Writing the value of a
motor starter parameter
(RESPONSE)16#001C 1 word Value of the parameter written (16#xxxx)
16#001E 1 byte Read parameter response counter
Aperiodic communications
(“Trigger bytes” for the responses) 16#001F 1 byte Write parameter response counter
—— 16#0020
…
16#00F3
1 byte
…
1 byte
Free input area
(212 bytes)
—— 16#00F4
…
16#01FF
1 byte
…
1 byte
Unusable input area
(268 bytes)