3
Data types
The UMG507 uses the following data types in Modbus Master Mode:
Higbyte before Lowbyte
UMG507 description
Type
Size
Range
float
float
4 Byte
+/-3.8*10
-38
to 3.4*10
38
(floating point format)
short
short
2 Byte
-32768 to 32767
u_short
unsigned short
2 Byte
0 to 65535
int
int
4 Byte
-2147483648 to 2157583647
u_int
unsigned int
4 Byte
0 to 4294967296
char
char
1 Byte
-128 to +127
bit
Bit always reads a complete register (16Bit)
Lowbyte before Highbyte
UMG507 description
Type
Size
Range
float.
l
float
4 Byte
+/-3.8*10
-38
to 3.4*10
38
(floating point format)
short.
l
short
2 Byte
-32768 to 32767
u_short.
l
unsigned short
2 Byte
0 to 65535
int.
l
int
4 Byte
-2147483648 to 2157583647
u_int.
l
unsigned int
4 Byte
0 to 4294967296
char.
l
char
1 Byte
-128 to +127
bit.
l
Bit always reads a complete register (16Bit)
I = inverted
RS485 connection
The RS485 connection of the UMG507 is designed as a 9 pole Sub D sleeve. We recommend a 9 pole Profibus plug
for connection (Type: SUBCON-PLUS-ProfiB/AX/SC Producer: Phoenix part.No.: 27 44 38 0 or comparable).
UMG507
Profibus plug SUBCON
390Ohm
220Ohm 390Ohm
ON OFF
1B
1A
3
8
VP (5)
GND (6)
2B
2A
Connection of the bus cables:
Connect the incoming bus cables always to the terminals 1A/1B (Also at the beginning of the bus system!) The
outgoing bus cable is connected to the terminals 2A/2B. The terminal resistors are activated via the slide switch at
the beginning and end of the bus system. The terminals for the outgoing bus cable (2A/2B) are disconnected
simultaneously.
