GEMTEQ I/O 3. GEM80 GEMCAN NETWORK
Table 3-1
C/D-Table Allocation – Node ID 1
PDO C/D-Table
PDO 0
0
1
2
3
PDO 1
4
5
6
7
PDO 2
8
9
10
11
PDO 3
12
13
14
15
Node 2 is allocated the next 16 words of C & D-Tables and a further 16 words for each device
up to Node ID 125. For a complete list of C/D-Table usage for GEMCAN I/O Scanner module
one, please refer to Appendix A.
If the user program contains D1, then the GEMCAN I/O Scanner will transmit the first PDO,
with a length of 2 words to Slave device 1.
If the user program contains D15, then the fourth PDO will be transmitted with a length of 4
words to Slave Device 1.
If the GEMCAN I/O Scanner is configured as a Slave device, with a Node ID of 4, then it
should use C/D48 to 63 in the user program, in order to exchange data with the Master.
Therefore you must declare all relevant C/D tables within the ladder program, see the
appropriate module data sheet.
3.5
STATES OF THE HOST GEM80 CONTROLLER
Data is only received from and transmitted to the GEMCAN network if the host GEM80
controller is in a Running-Normal Inputs state. In all other states, Halted, Test Inputs and
Single Cycle, no messages are transmitted by the GEMCAN I/O Scanner module and hence
all GEMTEQ I/O modules will adopt Freeze/Fallback strategy as defined by the application .
GEMTEQ I/O Technical Manual (T2031En)
Rev.02 (10/10)
Page 3-9
Summary of Contents for GEMTEQ I/O GEM80
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