84
8. Appendix B: Default Configuration
8.2. Content of the Gateway’s DPRAM Memory
The LUFP9 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
DeviceNet master (words used for managing the downstream Modbus network).
The flow of data exchanged between the TeSys U motor starters, the gateway and the DeviceNet 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

cModbus
Outputs
Inputs
INPUT data
memory zone
OUTPUT data
memory zone
LUFP9 Gateway
DeviceNet
Outputs
Inputs
DeviceNet (SLC500) Master
8.2.1. Input Data Memory Area
The gateway has 512 input bytes. Only the first 32 bytes are used. All of these 32 bytes make up the
gateway’s input area, referenced as “Input 1” in the RsNetWorx configurator.
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 Memory location free
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#01FF
1 byte
…
1 byte
Free input area
(480 bytes)