HMS Networks Anybus CompactCom 40 Network Manual page 168

® ™
Anybus CompactCom 40 - PROFINET IRT Transparent
Ethernet
2.4. Host Application Interface
25
50
Figure H.5.
Some signals in the host application interface have modified functionality and/or functions which must be
checked for compatibility. See the following sections.
Tx/OM3
In the 30-series, this pin is only used for Tx. It is tri-stated during power up, and driven by the Anybus
CompactCom UART after initialization. In the 40-series this pin is used as a fourth operating mode setting pin
(OM3). During startup after releasing the reset, this pin is read to determine the operating mode to use. The pin
is then changed to a Tx output.
In the 40-series, this pin has a built-in weak pull-up. If this pin, on a 30-series module or brick is unconnected,
pulled high, or connected to a high-Z digital input on the host processor, it will be compatible with the 40-series.
An external pull-up is recommended, but not required.
IMPORTANT
If this pin is pulled low by the host during startup in a 30-series application, any 40-series module or
brick, substituted in the application, will not enter the expected operating mode.
Related Information: Anybus CompactCom M40 Hardware Design Guide (HMSI-216-126), Section "Application
Connector Pin Overview"
Module Identification (MI[0..1])
These pins are used by the host application (i.e. your product) to identify what type of Anybus CompactCom that
is mounted. The identification differs between the 30-series and the 40-series.
NOTE
If your software use this identification you need to handle the new identification value.
MI1 MI0
LOW LOW
HIGH LOW
MI[0..1] shall only be sampled by the application during the time period from power up to the end of SETUP
state. The pins are low at power up and before reset release.
Related Information: Anybus CompactCom M40 Hardware Design Guide (HMSI-216-126), Section "Settings/
Sync".
Page 160 of 177
1
26
Module Type
Active Anybus CompactCom 30
Active Anybus CompactCom 40
Hardware Compatibility
SCM-1202-021 Version 2.6