GEMTEQ I/O 8. Maintenance and Fault Finding
8.2.3 Node
Presence
A master on a GEMCAN network will maintain a bit array of the devices present, as detailed in
Table 8-5.
Table 8-5
Node Presence
Module 1
Module 2
Description
F356
F364
Node Presence
Word 0 (Nodes 1 to 16)
F357
F365
“
Word 1 (Nodes 17to 32
F358
F366
“
Word 2 (Nodes 33 to 48
F359
F367
“
Word 3 (Nodes 49 to 64)
F360
F368
“
Word 4 (Nodes 65 to 80)
F361
F369
“
Word 5 (Nodes 81 to 96)
F362
F370
“
Word 6 (Nodes 97 to 112)
F363
F371
“
Word 7 (Nodes 113 to 128)
Node presence provides the easiest way for the application to detect the loss of I/O modules and
be able to take appropriate action.
8.3 DIAGNOSTICS
DATA
The Diagnostics Data can greatly assist the user during commissioning and fault finding a
GEMCAN system.
8.3.1
Node Data (Px+23-24, Px52-P53)
The Node Data is one word per slave device and gives the type of device fitted at a given Node
ID. The information is shown in the module node data area as defined in the configuration “P”
tables.
Px+23 defines the table letter for module 1, Px+52 for module 2.
Px+24 defines the table offset for module 1, Px+53 for module 2.
For example if Px+23 = 71 dec @47hex ASCII “G” and Px+24 = 1 then node ID1 data will be
placed table G1, node ID2 in G2, node ID10 in G10 etc (see table below).
Table 8-6
Node Data
Data
Table
Nod
e
Data
Nod
e
Add.
Module Fitted
G1
9730 1
24V d.c., 16-way Input Module
G2
9731 2
24V d.c., 0.5A, 16-way Output Module
G3
9732 3
110V a.c., 16-way Input Module
G4
9733 4
110V a.c., 1A, 16-way Output Module
G5
9734 5
8 In / 8 Out Combination Analogue Module
G6
9735 6
Relay, 3A, 16-way Output Module
GEMTEQ I/O Technical Manual (T2031En)
Page 8-5
Rev.02 (10/10)
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