VersaMax* Analog Input, 16-Bit Thermocouple Module
IC200ALG630
October 2016
GFK-1700L
4
When 45 or more faults are sent to a GBC70 within a single Genius
scan, a few faults or fault contacts may not be reported by the
GBC70. This is most likely to be caused by the sudden loss of
numerous blocks at each bus controller in the system. The
resulting PLC diagnostics and diagnostic contacts may be
incorrect.
Operational Notes
If hot insertion of a module is done improperly, the operation of
other modules on the same backplane may be disrupted. See
Installing a Module on a Carrier
in the
VersaMax Modules Manual,
GFK-1504.
Clarification of Default/Hold Last State configurations:
If there is an error on a specific input channel, the modules will
always report the Channel Default value from the Input Parameters
tab of the module configuration.
When a Loss of I/O Module fault is logged for a module, the CPU
or NIU will use the Default/Hold Last State setting from the Module
Parameters tab of the module configuration to determine what
value should be reported to the reference tables.
After an Open Circuit fault
condition
is corrected, the module takes
a few seconds to return to normal operation. During this time, the
module continues reporting the channel default input value. After
the module has recovered from the Open Circuit fault, it returns to
normal inputs and normal operation.
If there is a very large change in an input (for example, an input
quickly goes from 50mV to 400mV), the module may briefly report
an Over-range fault on that circuit even though the circuit is not
actually over its configured upper range limit. This is only
temporary.
When IC200ALG630 or IC200ALG620 modules are present in
GNIU or PNIU rack and a 'Clear all' command is issued from
Machine Edition software, Machine Edition may get disconnected,
displaying timeout error "error 8097 - host disconnect has
occurred". When this error is logged, the Configuration is still
cleared. To avoid this error, the
“Request Timeout” value in
“Additional Configuration” in “Target Properties” should be
increased to 30s or more.
When all the channels of IC200ALG630 are set inactive
and
the
Reference Junction Type parameter is not set to "local", VersaMax
CPUs / NIUs will report a
“Loss of IO modules” fault, that points to
the IC200ALG630 itself.
To avoid this fault, either configure at least one thermocouple
channel to active or set reference junction type parameter to
“local”.
Configuration
The default parameters of the Thermocouple Input module can be used
in many applications. The module can be software-configured when it is
installed in a PLC system, or an I/O Station controlled by an NIU that
supports software configuration.
Parameter
Default
Choices
Analog Input Data Length
7
1 to 7
Analog Input Data
Reference
user selectable
Analog Output Data
Length
0
0 to 7
Analog Output Data
Reference
user selectable
Line Frequency
60 Hz
50 Hz, 60 Hz
Suppress Open
Thermocouple
No
Yes, No
Channel Active
Active
Inactive (off), Active (on)
Engineering Units
1/10
degrees C
Millivolts, 1/10 degrees C, 1/10 degrees F
Thermocouple Type
J
None, J, K, T, S, R
Range
625
19.53, 39.06, 78.125, 156.25, 312.5, 625.
R J Type
Local
Local, Remote, Fixed, None
Alarm Low
–2000
–32,768 to +32,767
Alarm High
8000
–32,768 to +32,767
Reference Junction Value
250
–32,768 to +32,767
Correction Factor
0
–32,768 to +32,767
Channel Default Input
0
+32,767
Cold Junction Default
250
+32,767
Configurable Features
Channel Active
: Each channel can be configured as either active or
inactive. If a channel is inactive, the filtering, scaling, calibration, and
alarm checks are omitted for that channel, and a value of 0 is returned
for the channel. The reference parameter for the analog input data
returns the byte length and is independent of the number of active
channels.
Low Alarm Limit and High Alarm Limit:
Each input channel can have
a low alarm limit and a high alarm limit. If an input reaches one of its
limits, the module reports the actual value and sends the appropriate
diagnostic input bit. Alarms do not stop the process or change the value
of the input. Alarm limits can be set anywhere over the dynamic range
of the signal. The range for each is
–32,768 to +32,767. The high alarm
limit must be greater than the low alarm limit. If alarm reporting is not
wanted, alarm limits can be set beyond the dynamic range of the signal
so they will never be activated.
Thermocouple Limits
: The table below lists millivolt and temperature
limits for applicable thermocouple types.
TC Type
Low mV
Limit
High mV
Limit
Low
Temperature
Limit (C)
High
Temperature
Limit (C)
J
–8.0960
57.9420
–210.00
1000.00
K
–5.8910
54.8069
–200.00
1370.00
T
–5.6030
20.2520
–200.00
390.00
S
–0.1940
18.5040
–40.00
1750.00
R
–0.1880
20.8780
–40.00
1750.00
