Fig. 40 Input Byte Definition; Fig. 41 Linking Of 2-Bit Variable To Additional Task - Beckhoff EP3744-0041 Documentation

Commissioning/Configuration
• 1: Value is smaller than the limit value
• 2: Value is larger than the limit value
• 3: Value is equal to the limit value
Linking in the PLC with 2-bit values
The limit information consists of 2 bits. Limitn can be linked to the PLC or a task in the System Man-
ager.
• PLC:
IEC61131-PLC contains no 2-bit data type that can be linked with this process data directly. To transfer the limit information, you
should therefore define an input byte, for example, and link the limit to the VariableSizeMismatch dialog, as described in the
diagram Linking 2-bit variable with additional task.
Fig. 40: Input byte definition
• Additional task
2-bit variables can be created in the System Manager.
Fig. 41: Linking of 2-bit variable to additional task
Sample for EL3062:
Channel 1; Limit1 and Limit2 enabled, Limit 1 = 2.8 V, Limit 2 = 7.4 V, representation: signed integer
Entry in Index 0x80n0:13 [} 48] (Limit 1):
16
(2.8 V / 10 V) x 2 / 2 - 1 = 9,174
Entry in Index 0x80n0:14 [} 48] (Limit 2):
16
(7.4 V / 10 V) x 2 / 2 - 1 = 24,247
Output:
Input channel 1
Index 0x6000:03 [} 59]
1.8 V 0x01
2.8 V 0x03
4.2 V 0x02
8.5 V 0x02
64
dec
dec
, (Limit 1, limit value undershot)
hex
, (Limit 1, limit value reached)
hex
, (Limit 1, limit value exceeded)
hex
, (Limit 1, limit value exceeded)
hex
Index 0x6000:05 [} 59]
0x01 , (Limit 2, limit value undershot)
hex
0x01 , (Limit 2, limit value undershot)
hex
0x01 , (Limit 2, limit value undershot)
hex
0x02 , (Limit 2, limit value exceeded)
hex
Version: 2.2 EP3744-0041 and EP3744-1041