Siemens SIMATIC S7 Manual page 32

Parameter Decl. Type
ERROR OUT BOOL
STATUS_ OUT WORD
MODBUS
STATUS_ OUT WORD
CONN
STATUS_FUNC OUT STRING
IDENT_CODE OUT STRING
UNIT IN/
OUT
DATA_TYPE IN/
OUT
START_ IN/
ADDRESS OUT
LENGTH IN/
OUT
TI IN/
OUT
WRITE_ READ IN/
OUT
MODBUS / TCP communication via the integrated PN interface of the CPU
2XV9450-1MB02; Manual edition 2.1
Description
An error has occurred
No error has occurred
Error number for protocol errors when
evaluating a Modbus telegram
Error number for connection errors during
execution of the T blocks
(TCON, TSEND, TRCV, TDISON)
Name of the function, which causes the
[8] error at STATUS_MODBUS or
STATUS_CONN
Identification for licensing
[18] Please order your license with this
identification string.
BYTE Unit identification
(INPUT if in CLIENT mode, OUTPUT if in
SERVER mode)
BYTE Data type to be accessed:
(INPUT if in CLIENT mode, OUTPUT if in
SERVER mode)
Coils
Inputs
Holding registers
Input registers
WORD MODBUS start address
(INPUT if in CLIENT mode, OUTPUT if in
SERVER mode)
WORD Number of values to be processed
(INPUT if in CLIENT mode, OUTPUT if in
SERVER mode)
Coils
Reading function
Writing function
Inputs
Reading function
Holding Register
Reading function
Writing function
Input Register
Reading function
WORD Transaction Identifier
(INPUT if in CLIENT mode, OUTPUT if in
SERVER mode)
BOOL Write access or
Read access
(INPUT if in CLIENT mode, OUTPUT if in
SERVER mode)
Function Block MODBUSPN
Value range
TRUE
FALSE
0 to FFFF
0 to FFFF
Character
Character
0 to 255
B#16#0 to
B#16#FF
1
2
3
4
0 to 65535
W#16#0000 to
W#16#FFFF
1 to 2000
1 to 800
1 to 2000
1 to 125
1 to 100
1 to 125
0 to 65535
W#16#0 to
W#16#FFFF
TRUE
FALSE
Init
no
no
no
no
no
no
no
no
no
no
no
6-6