Siemens S7-1200 - Page 687

Communication processor and Modbus TCP
12.3 Point-to-point (PtP) communication
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
687
Parameter and type
Data type
Description
FLOWCTRL IN UInt Flow control (Default value: 0):
1 = No flow control, 2 = XON/XOFF, 3 = Hardware RTS always ON,
4 = Hardware RTS switched
XONCHAR IN Char Specifies the character that is used as the XON character. This is typically a
DC1 character (11H). This parameter is only evaluated if flow control is
enabled. (Default value: 0)
XOFFCHAR IN Char Specifies the character that is used as the XOFF character. This is typically
a DC3 character (13H). This parameter is only evaluated if flow control is
enabled. (Default value: 0)
XWAITIME IN UInt Specifies how long to wait for a XON character after receiving a XOFF
character, or how long to wait for the CTS signal after enabling RTS (0 to
65535 ms). This parameter is only evaluated if flow control is enabled.
(Default value: 2000)
DONE
OUT
Bool
TRUE for one execution after the last request was completed with no error
ERROR
OUT
Bool
TRUE for one execution after the last request was completed with an error
STATUS
OUT
Word
Execution condition code (Default value: 0)
Table 12- 9 Condition codes
STATUS (W#16#....)
Description
80A0
Specific protocol does not exist.
80A1
Specific baud rate does not exist.
80A2
Specific parity option does not exist.
80A3 Specific number of data bits does not exist.
80A4
Specific number of stop bits does not exist.
80A5
Specific type of flow control does not exist.
80A6
Wait time is 0 and flow control enabled
80A7
XON and XOFF are illegal values (for example, the same value)