DL205 User Manual, 4th Edition, Rev. D
5-277
Chapter 5: Standard RLL Instructions
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
ECDHCPE Example
Rung 1: The ECOM100 Config IBox is responsible for coordination/interlocking of all
ECOM100 type IBoxes for one specific ECOM100 module. Tag the ECOM100 in slot 1 as
ECOM100# K0. All other ECxxxx IBoxes refer to this module # as K0. If you need to move
the module in the base to a different slot, then you only need to change this one IBox. V400 is
used as a global result status register for the other ECxxxx IBoxes using this specific ECOM100
module.V401 is used to coordinate/interlock the logic in all of the other ECxxxx IBoxes using
this specific ECOM100 module. V402-V502 is a common 130-byte buffer available for use
by the other ECxxxx IBoxes using this specific ECOM100 module.
NOTE: An ECOM100 IBox instruction is used without a permissive contact. The top line will be identified in
BOLD italics, and the instruction name and ID will be in BOLD characters.
Rung 2: On the second scan, enable DHCP in the ECOM100. DHCP is the same protocol
used by PCs for using a DHCP Server to automatically assign the ECOM100’s IP Address,
Gateway Address, and Subnet Mask. Typically this is done using NetEdit, but this IBox
allows you to enable DHCP in the ECOM100 using your ladder program. The ECDHCPE is
leading edge triggered, not power-flow driven (similar to a counter input leg). The commands
to enable DHCP will be sent to the ECOM100 whenever the power flow into the IBox goes
from OFF to ON. The ECDHCPE does more than just set the bit to enable DHCP in the
ECOM100, it polls the ECOM100 once every second to see if the ECOM100 has found a
DHCP server and has a valid IP Address. Therefore, a timeout parameter is needed in case the
ECOM100 cannot find a DHCP server. If a timeout does occur, the Error bit will turn on and
the error code will be 1005 decimal. The Success bit will turn on only if the ECOM100 finds
a DHCP Server and is assigned a valid IP Address. If successful, turn on C100. If there is a
failure, turn on C101. If it fails, you can look at V2000 for the specific error code.
ECOM100 Config
ECOM10
To Next Page
Loading...
