Horner APG XL4 OCS HE-ETN300 - Manual (Page 57)

SUP0740-07 CH.7
11/30/2009 Page 57 of 98 # 958
CHAPTER 7: SERVICE REQUEST TRANSFER PROTOCOL (SRTP)
7.1 SRTP Overview
Service Request Transfer Protocol (SRTP) is a GE Fanuc Automation protocol, which allows a
remote SRTP Client to request services from an SRTP Server. In this context, the Ethernet
Module acts as an SRTP Server, which responds to requests from one or more SRTP Clients.
Since SRTP was originally designed to support services provided by GE Fanuc Series 90 PLC
products, the Ethernet Module’s SRTP protocol, for OCS and RCS products, does not support all
possible SRTP services. The Ethernet Module’s implementation of SRTP is mainly limited to
those services required for the exchange of PLC register data.
The following SRTP service requests are supported by the Ethernet Module:
Request Code Service Name
0 PLC_SSTAT
1 PLC_LSTAT
4 READ_SMEM
7 WRITE_SMEM
33 CHG_PRIV_LEVEL
67 RET_CONFIG_INFO
79 SESSION_CONTROL
97 PLC_FEATURES_SUPP
The READ_SMEM and WRITE_SMEM requests are supported for the following register types:
Selector Register Type
8 %R 16 bit
10 %AI 16 bit
12 %AQ 16 bit
16 %I 8 bit
18 %Q 8 bit
20 %T 8 bit
22 %M 8 bit
30 %S 8 bit
70 %I 1 bit
72 %Q 1 bit
74 %T 1 bit
76 %M 1 bit
84 %S 1 bit
7.2 SRTP Configuration
If SRTP protocol will be used in the application, the general Ethernet Module Configuration,
previously described in Chapter 3, must be performed, and SRTP must be enabled. To enable
SRTP protocol, use Cscape Programming Software, to perform the following two steps:
1. Open the Ethernet Module Configuration dialog (Figure 3.5 [page 18]) as described in
Chapter 3.