turck 6814035, Getting Started Manual

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Operating Spanner Modules at Modbus TCP
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7.3 Modbus TCP – Registers
7.3.1 Register 0x1130: Modbus Connection Mode
This register defines the behavior of the Modbus connections:
Address (hex.) Access
ro = read only
rw = read/
write
Description
0x0000 ro 8 DIP – Input data mapping
0x0001 ro Status Word
0x3000…0x30EF ro Packed process data of inputs
0x3400…0x34EF rw Packed process data of outputs
0x1000 …0x1006 ro Station Identifier
0x100C ro Module status
0x1012 ro Process image length in bit for the digital output modules
0x1013 ro Process image length in bit for the digital input modules
0x1017 ro Register mapping revision
Register mapping revision (always 1, if not, mapping is incompat-
ible with this description)
0x1020 ro Watchdog, actual time [ms]
0x1120 rw Watchdog predefined time [ms] (default: 0)
see
Error behavior (watchdog) (Seite 33)
0x1130 rw Modbus connection mode register (s. S. 32)
0x1131 rw Modbus connection timeout in sec. (default: 0 = never) (s. S. 33)
0x113C…0x113D rw Modbus Parameter Restore (s. S. 33)
(reset of parameters to default values)
0x113E…0x113F rw Modbus Parameter Save (s. S. 33)
(permanent storing of parameters)
Bit Name
–
Description
15 to 2 reserved
1 MB_ImmediateWritePermission
– 0:
With the first write access, a write authorization for the respective Modbus-connection is
requested. If this request fails, an exception response with exception-code 0x01 is generated. If
the request is accepted, the write access is executed and the write authorization remains active
until the connection is closed.
– 1:
The write authorization for the respective Modbus-connection is already opened during the
connection establishment. The first Modbus-connection thus receives the write authorization,
all following connections don’t (only if bit 0 = 1).
0 MB_OnlyOneWritePermission
– 0
: all Modbus-connections receive the write authorization
– 1
: Only one Modbus-connection can receive the write permission. A write permission is opened
until a Disconnect. After the Disconnect the next connection which requests a write access
receives the write authorization.