Yaskawa SMC–4000 - Manual (Page 134)

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SMC–4000 User Manual
IH (Internet Handle)
[Setting]
DESCRIPTION:
The IH command is used when the SMC–4000 must initiate communication to another Ethernet device.
This command opens a handle and connects to a slave.
The controller may have 8 handles open at any given time. They are designated by the letters A through H.
To open a handle, the user must specify:
The IP address of the slave
The type of session: TCP/IP or UDP/IP
The port number of the slave. This number is not necessary if the slave device doesn’t
require a specific port value. If not specified, the controller specifies the port value as
502.
ARGUMENTS: IHh= ip0, ip1, ip2, ip3
q or IHh=n
q orIHh= >r where
OPERAND USAGE:
_IHh0 contains the IP address as a 32 bit number
_IHh1 contains the slave port number
_IHh2 contains a 0 if the handle is free
contains a 1 if it is for a UDP slave
contains a 2 if it is for a TCP slave
contains a -1 if it is for a UDP master
contains a -2 if it is for a TCP master
contains a -5 if attempting to connect by UDP
contains a -6 if attempting to connect by TCP
_IHh3 contains a 0 if the ARP was successful
contains a 1 if it has failed or is still in progress.
Argument Minimum Maximum Note
h A H Internet handle
ip0 - ip3 0 255 Four bytes of IP address separated by
commas
n -2147483648 2147483647 32 bit address alternative to ip0 - ip3
S=>C -1 (UDP) -2 (TCP) Close the handle that sent the command
T=>C -1 (UDP) -2 (TCP) Close handles except the one sending the
command
0 65535 Specifies the port number of the slave,
not required for opening a handle
>q 0 2 Set connection type; 0=none; 1=UDP;
2=TCP
>r -1 (UDP) -2 (TCP) Terminate connection, and handle to be
freed