11
www.eltherm.com
11
www.eltherm.com
MODBUS INTERFACES
System interface
Type:
RS485 (Physical Layer)
Baud rate:
19200 Baud
Protocol:
N,8,2 / ModBus
number of devices: max. 32
SCADA interface
Type:
RS485 (Physical Layer)
Baud rate:
max. 38400 Baud
Protocol:
N,8,2 / ModBus
number of devices: max. 1
Read discrete inputs
Function = 0x02
Address = 0
QTY
=
48
Read device ID
Function = 0x2B
Object ID 00: eltherm GmbH
Address = 0x0E
Object ID 01: ELTC-52
ID Code = 0x01
Object ID 02: Rev01, Bxxx
Object ID = 0x00
ModBus parameters
Bit 0
Bit 1
Bit 2
Hybrid relay
Alarm relay
OT relay
Bit 3
Bit 4
Bit 5
softstart
U/I output 1
Digit In 1
Bit 6
Bit 7
Bit 8
Digit In 2
Digit In 3
Alarm: X1 High-
temp.
Bit 9
Bit 10
Bit 11
Alarm: X1 Low-
temp.
Alarm: X2 High-
temp.
Alarm: X2 Low-
temp.
Bit 12
Bit 13
Bit 14
Alarm: Heating-
cable
-
-
Bit 15
Bit 16
Bit 17
-
State: X1 Pre High-
temp.
State: X1 Pre Low-
temp.
Bit 18
Bit 19
Bit 20
State: X2 Pre High-
temp.
State: X2 Pre Low-
temp
State: External off
mode
Bit 21
Bit 22
Bit 23
State: External SP2
mode
-
-
Bit 24
Bit 25
Bit 26
E01: AE1 short
E02: AE1 open
E03: AE1 3wire
Bit 27
Bit 28
Bit 29
E04: AE2 short
E05: AE2 open
E06: AE2 3wire
Bit 30
Bit 31
Bit 32
E07: AE3 input
E08: AE4 input
E09: Hybrid open
Bit 33
Bit 34
Bit 35
E10: Hybrid short
E11: Limiter active E12: Mains supply
Bit 36
Bit 37
Bit 38
-
-
-
Bit 39
Bit 40
Bit 41
E19: internal
Ramp: started
Ramp: pause
Bit 42
Bit 43
Bit 44
Ramp: powerdown
-
Ramp: Cycle fina-
lized
Bit 45
Bit 46
Bit 47
Ramp: Controlled
stopped
Ramp: Temp. Alarm
Ramp: Uncontrol-
led stopped