Vacon 100 - Page 28

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Attribute Identifier 03
h
. This attribute allows control of the TCP/IP network interface configuration.
The attribute has data type DWORD (32-bit).
Using Configuration Control-attribute, device can be configured to use statically assigned IP values
or DHCP. If value is changed from DHCP to statically assigned, device will continue using current IP
address. When changing from statically assigned to DHCP, drive will try to get IP address from
DHCP server. If this fails, then communication with drive cannot be re-opened and user must set IP
address manually from panel or enable DHCP server in network.
Changing Configuration Control is not allowed if I/O connection is open.
In the Vacon 100 product, if the “IP Address Mode” panel parameter is “Fixed IP” then the value of
Configuration Control is 0. If the “IP Address Mode” is “DHCP” then the value of the Configuration
Control is 2.
Vacon 100 does not support BOOTP or DNS.
Instance Attribute “Physical Link Object”
The TCP/IP Interface Object has an instance attribute named “Physical Link Object” which has the
Attribute Identifier 04
h
. This attribute identifies the object which is associated with the underlying
physical communications interface (in the case of Ethernet e.g. an IEEE 802.3 interface). The attri-
bute consists of two components; a Path Size, which reveals the number of UINT values in the path,
and the Path itself.
In Vacon 100 the path points to an instance of the EtherNet Link Object. The value of Path Size is 2
(total of four octets) and the value of the Path is 20
h
F6
h
24
h
XX
h
, where XX is the instance number of the
EtherNet Link object.
Instance Attribute “Instance Configuration”
The TCP/IP Interface Object has an instance attribute named “Interface Configuration”, having the
Attribute Identifier 5
h
, which contains the configuration parameters required for a device to operate as a
TCP/IP node. The contents of the attribute depend on how the device has been configured to obtain
its IP parameters (the “Configuration Method” field in the Configuration Control attribute). If the
device uses a static IP address (Configuration Method value is 0) then the values in the Interface
Configuration are those statically assigned and stored in non-volatile memory. If the device uses
DHCP (or BOOTP) (Configuration Method value is 1 or 2) then the Interface Configuration values
will contain the configuration obtained through this channel. Until the BOOTP/DHCP reply is
received, the values are 0.
Table 14.
Bit(s) Name Definition
0-3 Configuration
Method
Determines how the
device shall obtain its
IP related configura-
tion
Value Definition
0 The device shall use statically-
assigned IP configuration values.
1 The device shall obtain its inter-
face
configuration values via BOOTP
2 The device shall obtain its inter-
face
configuration values via DHCP
3-15 Reserved for future use.
4 DNS Enable If TRUE, the device shall resolve host names by querying a DNS
server
5-31 Reserved Reserved, always zero