GE 90-30 PLC Series Installation And Hardware Manual page 128

Embedded Ethernet Interface (CPU364 and CPU374)
The CPU364 and CPU374 consist of a CPU and an Ethernet Interface combined in one module.
These modules offer Ethernet capabilities formerly available only with the separate
IC693CMM321 Ethernet module. The CPU364 and CPU374 offer several advantages compared
to using a separate CPU and Ethernet module:
GFK-0356Q Chapter 5 CPUs
stamp is only placed once at the trigger point. The SER does not support more than one time
stamp per recording.
The SER can be configured for pre-, mid-, or post-trigger modes.
It only occupies one slot in the PLC baseplate compared to the two slots required by separate
CPU and Ethernet modules.
The CPU374 has two 10/100 BASE-T/TX ports connected to an embedded network switch.
The IC693CMM321 Ethernet module requires an external transceiver. The CPU364 does not
require one since it has this functionality built-in. To use this internal transceiver, connect to
the 10BASE-T port. However, if you choose, you may use an external transceiver by
connecting to the CPU364's AAUI port, which bypasses the internal transceiver (see
Appendix J for GE transceiver information).
The CPU374 does not require an external transceiver for either of its 10/100 BASE T/TX
ports.
Because they both reside in the CPU module, the CPU and Ethernet Interface can
communicate without using the PLC backplane. This provides faster communications speed
compared to using separate CPU and Ethernet modules, which have to use the slower path
across the PLC backplane.
Beginning with Firmware Release 9.1, the Ethernet Global Data (EGD) and configurable
Name Resolution features were added to the CPU364. The CPU374 supports EGD, but not
Name Resolution. These features are not supported by the IC693CMM321 Ethernet module.
Logicmaster software does not support these features. They are supported only in Control,
Version 2.2 or later, all versions of VersaPro software, and CIMPLICITY Machine Edition
software Logic Developer-PLC. For details about these features, please see publication GFK-
1541A or later, TCP/IP Ethernet Communications for the Series 90 PLC User's Manual.
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