Elpro Technologies 450U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 1.0.12-Beta7
www.cooperbussmann.com/wirelessresources
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Digital Input Bits
Registers
Purpose
10001
Local Digital Input Register
10002
10003
Setpoint status Register for Analog Input 1
Setpoint status Register for VSupply
10021 - 10500
I/O Space for locally attached 115S expansion I/O modules. 20 registers per
module address. Max 24.
10501 - 12500
General Purpose Bit Storage Area assigned in memory for Modbus Mapping
storage.
Analog Input Registers
Registers
Purpose
30001
30002
Local Analog Input Register)
Local Supply Voltage (8-40VDC)
30021
30493
I/O Space for locally attached 115S expansion I/O modules. 20 registers per
module address. Max 24.
30494 - 30500
Internal information registers Serial Number, Firmware Version and Patch Level.
30501 - 32500
General Purpose Bit Storage Area assigned in memory Modbus Mapping
storage.
38001
38003
Local DIO register (as a Floating Point value)
Local Supply Voltage (8-40VDC) as a Floating Point)
Expansion I/O
115S Serial Expansion I/O modules can be added to provide additional I/O.
When adding expansion I/O modules to the 450U-E the appropriate serial port must be configured
.
The default serial parameters of the port should be 9600, N, 8, 1 which match the defaults of the 115S serial expansion
modules. These parameters can be changed, to increase poll speeds in larger systems however the 115S serial port and
the 450U-E serial port will need to match.
adjusted.
Connect the serial expansion module and take note of the address (Rotary switches on the bottom) as this address will
be used as an offset to locate the I/O within the 450U-E.
Make sure the devices at either end of the RS485 cable have the termination switch enabled (on), this includes the 450U-
E. Failure to terminate the RS485 correctly could result in the modules not operating correctly.
115S Expansion I/O Memory Map
I/O data on the 115S module is read into memory locations according to their Modbus address. The maximum number of
Modbus addresses is 24.
on of all of its registers. This Offset is equal to the units
Modbus address (selected on the rotary switch on the end of the 115S expansion I/O module) multiplied by 20.
E.g. If connecting a 115S-11 (16 x DIO) with address #15
Digital input 1 will be at register location 10301. ((15*20) +10001)
Digital Output 1 will be at register location 301 ((15*20) +1)
If using a 115S-12 (8 x DIO & 8 AIN) with address 16
Digital input 1 will be at register location 10321 ((16*20) +10001)
Analog input 1 will be at register location 30321 ((16*20) +30001)
