85
8. Appendix B: Default Configuration
8.2.2. Output Data Memory Area
The gateway has 512 output bytes. Only the first 32 bytes are used. All of these 32 bytes make up the
gateway’s output area, referenced as “Output 1” in the RsNetWorx configurator.
Service Address Size Description
Managing the downstream
Modbus network 16#0200 1 word DeviceNet master command word
16#0202 1 word Value of the motor starter c command register
16#0204 1 word Value of the motor starter d command register
16#0206 1 word Value of the motor starter e command register
16#0208 1 word Value of the motor starter f command register
16#020A 1 word Value of the motor starter g command register
16#020C 1 word Value of the motor starter h command register
16#020E 1 word Value of the motor starter i command register
Periodic communications
—
Controlling
TeSys U motor starters
16#0210 1 word Value of the motor starter j command register
16#0212 1 byte Slave no. (16#01 to 16#08)
16#0213 1 byte Function number (16#03)
16#0214 1 word Address of the parameter to be read (16#xxxx)
Aperiodic communications
—
Reading the value of a
motor starter parameter (QUERY)
16#0216 1 word Number of parameters to be read (16#0001)
16#0218 1 byte Slave no. (16#01 to 16#08)
16#0219 1 byte Function number (16#06)
16#021A 1 word Address of the parameter to be written
(16#xxxx)
Aperiodic communications
—
Writing the value of a
motor starter parameter (QUERY)
16#021C 1 word Value of the parameter to be written (16#xxxx)
16#021E 1 byte Read parameter query counter
Aperiodic communications
(“Trigger bytes” for the queries) 16#021F 1 byte Write parameter query counter
——
16#0220
…
16#03FF
1 byte
…
1 byte
Free output area
(480 bytes)
8.2.3. Total Number of Modbus Queries and Responses
The total number of Modbus queries and responses is equal to 36 (2 periodic queries and 2 periodic
responses for each of the 8 TeSys U motor starters, plus 2 aperiodic queries and 2 aperiodic responses for all of
these motor starters). Since the total number of the Modbus queries and responses one can configure for a
single gateway is limited to 50, there is only 14 spare Modbus queries and responses (that is to say the
equivalent of 7 Modbus commands).
So this reserve does not allow the addition of any single Modbus command for each of the TeSys U motor
starters, as this would require the use of 16 Modbus queries and responses (1 query and 1 response for each of
the 8 motor starters).