Micromod MOD: 30MLTraining Manual - Manual (Page 157)

10 Peer-to-Peer Communications
10.1 Foreword
Communications between MOD30ML instruments takes place over the Instrument
Communications Network (ICN). The ICN is a token passing, deterministic network,
which updates every 250ms. Using the ICN, MOD30ML can also communicate with
MODCELL Multiloop Processors and MOD30 1700 Series instruments on a peer-to-peer
basis. “Peer-to-peer” means there is no network master and each instrument is guaranteed
access to the network within a certain timeframe.
ICN signals are received in the Input Communications Blocks. ICN signals are sent via
the Output Communications Blocks. MOD 30ML, MODCELL and MOD 30 all have
these blocks. When configuring the Input Communications Block of a MOD 30ML, the
user must specify the ICN address and Output Communications Block number from the
instrument sending the data. When configuring an Output Communications Block in
MOD 30ML, the user must specify the ICN address and Input Communications Block
number of the instrument receiving the data.
There are 32 Input Communications Blocks and 32 Output Communications Blocks
available in each MOD 30ML controller.
10.2 Objective
In this lab we will configure PID master/slave signals between two MOD 30MLs over the
ICN as shown below. The lab is based on a strategy already containing a PID block and
display.
Figure 10 .1.
ICN Architecture
(Note that the IC
and OC
occurrence
numbers and
instrument
addresses are only
examples for the
purposes of this
lab. They do not
imply any
requirement to use
these addresses.)
40.
AU
LOC
OP
FIC - 10
65.
/
25.2
AU
LO
OP
LI -10
48.6
/
ARSP
TS TCI
ICN Addr 1
40.0
AU
LO
O
FIC - 10
65.2
/
LIC-
40.0
AUT
LO
S
MASTER
65.2
25.2
AU
LOC
OP
LI -10
48.6
/
FIC-
OP
OPTI
RSPI
48.6
SLAVE
25.2
OP
/
AUT
REM
/
ICN Addr 2
10 - 1