Horner APG XL4 OCS HE-ETN300 - Manual (Page 58)

CH.7 SUP0740-07
11/30/2009 Page 58 of 98 # 958
2. Enable SRTP by checking the SRTP Slave (90-30 Service Request) checkbox in the
Module Configuration dialog (Figure 3.5).
No additional configuration is required for SRTP protocol. As long as SRTP is enabled and the
Ethernet Module has been assigned an IP Address and Net Mask, it will respond to service
requests from an SRTP Client, such as a PC running GE Fanuc CIMPLICITY Plant Edition
software.
7.3 SRTP Operation
With respect to SRTP protocol, the Ethernet Module’s behavior depends on whether the OCS is
in RUN mode or not.
When the OCS is in RUN mode, the Ethernet Module responds normally to SRTP Client
requests.
When the OCS is not in RUN mode, the Ethernet Module still responds to SRTP Client requests,
with the following differences:
1. When a WRITE_SMEM request is received from an SRTP Client, to write a block of OCS
registers, a reply is sent to the client, but the data is not written to OCS registers.
2. When a READ_SMEM request is received from an SRTP Client, to read a block of OCS
registers, a reply is sent to the client, but the data returned to the client is the last known
values of the requested OCS registers, and is not actually read from the OCS registers.
3. For
all requests received from an SRTP Client, the reply will indicate to the client that the
OCS is not in RUN mode, by returning the RUN DISABLED code in the Piggyback Status
word.