GE Industrial Solutions EntelliGuard TU Trip Units - Manual (Page 66)

EntelliGuard TU Trip Units: UL/ANSI Models DEH-4567B
Profibus Communication
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The Profibus bus address (MAC ID) of the GTU slave, which
has a range from 1 to 125, can be set via the front cover
switches. At power up, the GTU reads its address from the
two rotary switches on its front and initializes the bus
communication. Changes of the station address take effect
with the next reset or power up.
The GTU supports auto-baud rate detection. The available
baud rates and other slave specific information needed for
configuration are in the GTU GSD file, which is used by a
network configuration program.
To communicate with a Class 1 master (PLC) in a system,
the GTU GSD file is required.
PROFIBUS GTU DP CYCLIC DATA
The cyclic data is a fast process data transfer between the
Profibus DP master and the slave, which occurs once in
every DP cycle. GTU is a modular device supporting up to
144 bytes of input data.
Modules define a block size of input and output data to be
read by the master, starting from offset zero. During the
network configuration session, modules with varying sizes
of input data are provided in the GSD file.
GTU CYCLIC READ TELEGRAM DEFINITIONS
Table 9-1: GTU Cyclic Read Telegram Definitions
Cyclic Read
Telegram ID Parameter
No. of
Bytes Units
B5020 Temperature Input 1 2
B5021 Temperature Input 2 2
B5022 Temperature Input 3 2
B5023 Temperature Input 4 2
B5024 Voltage Phase A 2
B5025 Voltage Phase B 2
B5026 Voltage Phase C 2
B5027 Current Phase A 4
B5028 Current Phase B 4
B5029 Current Phase C 4
B5030 Current Phase N 4
B5031 Energy Total 8
B5032 Energy Rollover Count 2
B5033 Power Factor Phase A 2
B5034 Power Factor Phase B 2
B5035 Power Factor Phase C 2
B5036 Power Factor Total 2
B5037 Power Real Phase A 2
B5038 Power Real Phase B 2
B5039 Power Real Phase C 2
B5040 Power Real Total 2
B5041 Power Reactive Phase A 2
B5042 Power Reactive Phase B 2
B5043 Power Reactive Phase C 2
B5044 Power Reactive Total 2
B5045 Power Apparent Phase A 2
B5046 Power Apparent Phase B 2
B5047 Power Apparent Phase C 2
B5048 Power Apparent Total 2
B5049 Power Demand Total 2
B5050 Frequency Measured 2
B5051 Longtime Pickup Status 2
B5052 Discrete Flags 6
The following tables describe the 6 bytes of GTU discrete flags cyclic input data provided in the GSD file:
Table 9-2: Byte 1
Shunt 1 Trip
Status
Bell Alarm/
Lockout
Actuation
Bell Alarm
Actuation
Input 4
Status
Input 3
Status
Input 2
Status
Input 1
Status
Relay 4
Status
15 14 13 12 11 10 9 8
B1_7 B1_6 B1_5 B1_4 B1_3 B1_2 B1_1 B1_0
1 1 1 1 1 1 1 1
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