GE VersaPoint IC220ALG221 System Manual
VERSA POINT I/O MODULE
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
6226B_GE
This data sheet is only valid in association with the System Manual.
09/2002
Function
The terminal is designed for use within an
VersaPoint station. It is used to measure analog
voltage or current signals.
Features
– Eight analog single-ended signal inputs for
the connection of either voltage or current signals
– Sensors are connected using 2-wire techno-
logy
– Various current and voltage measuring ran-
ges
– Channels are configured independently of
one another using the bus
– Measured values can be represented in five
different formats
– 16-bit analog-to-digital converter
– Process data multiplex operation
– Diagnostic indicators
6 2 2 6 0 0 0 1
6 2 2 6 A 0 0 2
Figure 1 The ANALOG IN 15 BIT VOLTAGE/
CURRENT 8CH terminal with
connectors
Please note that the connectors are
not supplied as standard with the terminal. Please refer to the ordering
data on page 45 to order the appropriate connectors for your application.
6226B_GE 1
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
Local Diagnostic Indicators and Terminal Assignment
Local Diagnostic Indicators
D
A I 8 / S F
1 2
1 . 1
1 . 2
1 . 3
1 . 4
2 . 1
1
1
2 . 2
2
2
2 . 3
3
3
2 . 4
4
4
6 2 2 6 A 0 0 3
Figure 2 The ANALOG IN 15 BIT VOLTAGE/
CURRENT 8CH terminal
with an appropriate connector
Des. Color Meaning
D Green Bus diagnostics
Terminal Assignment for Each Connector
Terminal
Signal Assignment
Points
1.1 +U1 Voltage input channel 1
2.1 +U2 Voltage input channel 2
1.2 +I1 Current input channel 1
2.2 +I2 Current input channel 2
1.3, 2.3 -1, -2 Minus input (for both cur-
rent and voltage)
1.4, 2.4 Shield Shield connection
Installation Instructions
High current flowing through potential jumpers UM and US causes the temperature of the potential
jumpers and the internal temperature of the terminal to increase. Observe the following instructions
to keep the current flowing through the potential jumpers of the analog terminals as low as possible:
All of the analog terminals need a separate main circuit.
If this is not possible in your application and if you are using analog terminals in a main
circuit together with other terminals, place the analog terminals behind all the other
terminals at the end of the main circuit.
2 6226B_GE
Internal Circuit Diagram
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
I N T E R B U S
U
L +
U
A N A
U
L -
2 4 V
+
5 V
-
R E F
2 2
2
+ 2 4 V ( U
+ 2 4 V ( UM)
U
I N 1
)
S
I
I N 1
1
U
I N 2
I
I N 2
U
I N 3
I
I N 3
U
Figure 3 Internal wiring of the terminal points
Key:
OPC
Protocol chip
I N 4
I
I N 4
O P C
µ P
M U X
2 2
4
4
2 2
E E P R O M
S U P E R
44
2
U
I N 5
I
I N 5
U
I N 6
I
I N 6
U
I N 7
I
I N 7
U
I N 8
I
I N 8
6 2 2 6 A 0 0 4
x x x
X X X
Power supply unit with electrical
isolation
R E F
Amplifier
M U X
µ P
E E P R O M
S U P E R
Optocoupler Reference voltage source
Microprocessor Analog-to-digital converter
Electrically erasable, reprogrammable read-only memory
Microprocessor monitoring Multiplexer
6226B_GE 3
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
B
Electrical Isolation
I N T E R B U S
l o c a l b u s ( I N )
U
( 7 . 5 V D C )
L
U
( 2 4 V D C )
A N A
B u s i n t e r f a c e O P C a n d
m i c r o p r o c e s s o r
2 4 V
+
5 V
-
+
5 V
-
i n t e r f a c e
A n a l o g i n p u t sF E p o t e n t i a l
I / O
I N T E R B U S
l o c a l b u s ( O U T )
( 7 . 5 V D C )
U
L
U
( 2 4 V D C )
A N A
A
B
E l e c t r i c a l i s o l a t i o n
b e t w e e n a r e a A a n d
6 2 2 6 0 0 0 5
Figure 4 Electrical isolation of the individual
function areas
Connection Notes
Do not simultaneously apply current and voltage signals to one input channel as you will
not obtain valid measured values.
Do not connect voltages above ±2.5 V to a current input. The electronics module will be
damaged if the maximum permissible current of ±100 mA is exceeded.
Always connect the analog sensors using shielded, twisted-pair cables.
Connect the shielding to the VersaPoint terminal using the shield clamp. The clamp con-
nects the shield directly to FE (functional earth ground) on the terminal side. Additional
wiring is not required.
Isolate the shielding at the sensor or connect it with a high resistance and a capacitor to
the PE potential.
4 6226B_GE
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
o
Connection Examples
Observe the connection notes on
page 4.
Figure 5 shows the connection schematically
(without shield connector).
Connection of Active Sensors
S l o t
C h a n n e l 1 2 3 4 5 6 7 8
1
A I 8 S F
1 2
1
D
1 2
1
1
3 4
2
1 2
1 2
1
1
1
1
1
Programming Data
ID code 5F
Length code 02
Process data channel 32 bits
Input address area 4 bytes
Output address area 4 bytes
Parameter channel (PCP) 0 bytes
Register length (bus) 4 bytes
hex
hex
(95
dec
)
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
I N
V o l t a g e s e n s o r t o
c h a n n e l 1
C u r r e n t s e n s o r t
c h a n n e l 8
I N
Figure 5 Connection of active sensors using
2-wire technology with shield
connection
The sensors have the same reference
potential.
6226B_GE 5
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
Process Data Words
Process Data Output Words for the Configuration of the Terminal (see page 7)
Process Data Output Word 0 (OUT[0]) Process Data Output Word 1 (OUT[1])
Byte 0Byte 1Byte 2Byte 3
OUT[0]
(Byte.bit)
view
(Byte.bit)
view
Byte Byte 0 Byte 1 Bit 7654321076543210 Assignment 0
Byte
Bit 7654321076543210
Assignment 000000
Command 00000000
OUT[1]
Byte 2 Byte 3
Filter 0 Format Measuring
range
Process Data Input Words (see page 11)
Process Data Input Word 0 (IN[0]) Process Data Input Word 1 (IN[1])
Byte 0Byte 1Byte 2Byte 3
IN[0]
(Byte.bit)
view
(Byte.bit)
view
6 6226B_GE
Byte
Bit 7654321076543210
Assignment 1514131211109876543210
Byte
Bit 7654321076543210
Assignment 1514131211109876543210
Byte 0 Byte 1
Depends on the command
IN[1]
Byte 2 Byte 3
Depends on the command
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
Process Data Output Words OUT[0] and OUT[1]
The terminal must be configured using the two
process data output words. The word OUT[0]
contains the command and the word OUT[1]
contains the parameters for this command.
The following configurations are possible:
– Selecting a measuring range according to
the input signal
– Selecting the mean-value generation (filte-
ring)
– Changing the formats for the representation
of measured values
Current or voltage measurement is
selected by applying the measured signal to the current or voltage input
and then configuring the measuring
range.
O U T [ 0 ] O U T [ 1 ]
M S B L S B
1 5
After applying voltage (power up) to
the VersaPoint station, the message
"Measured value invalid" (diagnostic
code 8004
) appears in the process
hex
data input words for every channel
scanned. The message is displayed
until the appropriate channel has
been configured.
If the configuration is changed, the
message "Measured value invalid"
(diagnostic code 8004
) appears for
hex
a maximum of 100 ms.
Please note the extended runtime
when a channel is configured for the
first time and every time a channel is
reconfigured.
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
R e s e r v e d ( 0 0 0 0 0 0
M S B L S B
1 5
C o m m a n d
)
b i n
R e s e r v e d ( 0 0 0 0 0 0 0 0
F i l t e r
R e s e r v e d ( 0 )
F o r m a t M e a s u r i n g r a n g e
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
)R e s e r v e d ( 0 )
b i n
6 2 2 6 A 0 0 7
Figure 6 Process data output words
MSB Most significant bit LSB Least significant bit
Set all reserved bits to 0.
6226B_GE 7
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
OUT[0] (Command Code)
OUT[0]
Bit 1514131211109876543210
Assignment 0
Command 00000000
Bit 15 to bit 8 (command):
Bit 15 to Bit 8 OUT[0] Command Function
0
0 0 0 0 Z2Z1Z00x00
0 0 1 0 Z2Z1Z01x00
0
0 0 1 1 1 1 0 03C00
0
1 0 0 0 Z2Z1Z04x00
0
1 0 1 0 Z2Z1Z05x00
1 1 0 0 0 0 0 6000
0
0
1 1 1 0 Y Y1Y07x00
Read measured value of channel x
hex
Read configuration of channel x
hex
Read firmware version and module identification
hex
Configure channel x
hex
Configure channel x and read measured value of
hex
channel x Configure entire terminal (all channels)
hex
Commands for groups without mirroring
hex
Z2Z1Z0Channel number
Y
2Y1Y0
Group number
OUT[0]
Bit 1514131211109876543210
Assignment 0
Channel/group 0 X X X X
Bit 10 to bit 8 (channel number Z
Command 00000000
X X X00000000
or group number Y2Y1Y0):
2Z1Z0
Code Channel Code Group
bin dec bin dec
000 0 1 000 0 4 x 8-bit group A (channel 1, 2, 3, and 4)
001 1 2 001 1 4 x 8-bit group B (channel 5, 6, 7, and 8)
010 2 3 010 2 Reserved
011 3 4 011 3 Reserved
100 4 5 100 4 2 x 16-bit group A (channel 1 and 2)
101 5 6 101 5 2 x 16-bit group B (channel 3 and 4)
110 6 7 110 6 2 x 16-bit group C (channel 5 and 6)
111 7 8 111 7 2 x 16-bit group D (channel 7 and 8)
8 6226B_GE
OUT[1] (Parameter Word)
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
The parameters for the commands 4x00
hex
, 5x00
, and 6000
hex
must be specified in OUT[1]. This
hex
parameter word is only evaluated for these commands.
OUT[1]
Bit 151413121110 9 8 7 6 5 4 3 2 1 0
Assignment 000000
Filter 0 Format Measuring range
If invalid parameters are specified in the parameter word, the command will not be executed. The command is confirmed in the input words with the set error bit.
Bit 9 and bit 8:
Code Filter (Filtering by Mean-Value Generation)
bin dec
00 0 16-sample average (default)
01 1 No mean-value generation
10 2 4-sample average
11 3 32-sample average
Bit 6 to bit 4:
Code Format bin dec 000 0 IB IL (15 bits) (default)
001 1 IB ST (12 bits)
010 2 IB RT (15 bits)
011 3 Standardized display
100 4 PIO (for the 4 mA to 20 mA range only)
101 5
Reserved110 6
111 7
6226B_GE 9
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
Bit 3 to bit 0:
Code Measuring Range (Voltage)
bin dec
0000 0 0 V to 10 V (default)
0001 1 ±10 V 0010 2 0 V to 5 V 0011 3 ±5 V 0100 4 0 V to 25 V 0101 5 ±25 V 0110 6 0 V to 50 V 0111 7 Reserved
The differential voltage between different terminal inputs must not exceed 50 V.
If, for example, the 0 V to 50 V range is used on one channel, the use of bipolar ranges is
not permitted on any other channel.
Code Measuring Range (Current)
bin dec
1000 8 0 mA to 20 mA
1001 9 ±20 mA 1010 10 4 mA to 20 mA 1011 11 Reserved 1100 12 0 mA to 40 mA 1101 13 ±40 mA 1110 14 Reserved 1111 15 Reserved
10 6226B_GE
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
Process Data Input Words IN[0] and IN[1]
The measured values and diagnostic messages (diagnostic codes) are transmitted to the controller
board or computer using the two process data input words. The contents of the words vary according
to the command.
IN[0] and IN[1] for Commands 0x00
to 6000
hex
hex
I N [ 0 ] I N [ 1 ]
M S B L S B
1 5
R e s u l t
M S B L S B
1 5
M i r r o r i n g o f t h e
c o m m a n d c o d e
E r r o r b i t
0 0 0 0 0 0 0 0
b i n
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
6 2 2 6 A 0 0 8
Figure 7 Process data input words
IN[0]
The output word OUT[0], which contains the command code, is mirrored in the input word IN[0]. This
confirms that the command has been executed correctly. If the command was not executed correctly,
the error bit is set in bit 15 of the input word IN[0].
The error bit is set if one of the following reasons (see page 29):
– There is no valid configuration for the channel scanned
– There was an invalid parameter during configuration
– A reserved bit was set
The command is only mirrored if it has been executed completely. That means, for example, that the
5x00
6226B_GE 11
command is only mirrored after the value has been read and not after reconfiguration.
hex
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
IN[1]
The input word IN[1] varies depending on the command.
IN[1] contains the firmware version and module identification for the 3C00
command.
hex
IN[1]
Bit 1514131211109876543210
Assignment
Firmware version Module ID Example: 123
hex
:
6
hex
Terminal equipped with firmware version 1.23
For the commands 1x00
hex
, 4x00
, and 6000
hex
, IN[1] contains the mirroring of the specified con-
hex
figuration.
IN[1]
Bit 1514131211109876543210
Assignment 0 0 0 0 0 0
Filter 0 Format Measuring range
12 6226B_GE
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
For the 0x00
and 5x00
hex
commands, IN[1] contains the analog measured value.
hex
IN[1] Bit 151413121110 9 8 7 6 5 4 3 2 1 0 Assignment Measured value in the appropriate format
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 11 5
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 11 5
O R0 / 4 O C
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 11 5
F o r m a t :
I B I L
I B R T
S t a n d a r d i z e d
d i s p l a y
I B S T
P I O
6 2 2 6 A 0 1 0
M S B L S B
S B
S B
A V
A V
A V
Figure 8 Representation of the measured values in the different formats
SB Sign bit OC Open circuit
AV Analog value OR Overrange
0/4 4 to 20 mA measuring range
MSB Most significant bit LSB Least significant bit
The individual formats are explained in the Section „Formats for Representation of Measured Values“
auf Seite 16.
6226B_GE 13
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
IN[0] and IN[1] for the Group-Commands 7x00
hex
I N [ 0 ] I N [ 1 ]
M S B L S B
1 5
R e s u l t
M S B L S B
1 5
R e s u l t
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
01 4 1 3 1 2 1 1 1 0 9 8 7 6 5 4 3 2 1
6 2 2 6 A 0 1 3
Figure 9 Process data input words
For the group commands 7x00
, both input words contain the measured values of the channels that
hex
correspond with the group command.
Group Commands for Two 16-bit Channels: 7400
hex
, 7500
hex
, 7600
, and 7700
hex
hex
With commands for two 16-bit channels, the analog value of one channel is mapped to every input
word. The display corresponds with the display in the input word IN[1] for the 0x00
and 5x00
hex
hex
commands.
Example 2 x 16-Bit Group A (Channels 1 and 2): 7400
Command
hex
IN[0]
Bit 1514131211109876543210
Assignment
16-bit measured value channel 1 in the appropriate format
IN[1]
Bit 1514131211109876543210
Assignment
16-bit measured value channel 2 in the appropriate format
14 6226B_GE
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