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2150EX Area Velocity Flow Module
Section 4 Modbus Protocol
Table 4-2 Modbus ASCII Address 2-(N+1) Register Definitions (Continued)
Register Number(s)
(1) A write to the Identify module register will cause the module to perform the identify operation which may be a steady
LED for a few seconds or a beep in the Field Wizard.
(2) Setting the Take Reading flag to 1 will cause the module to update the registers with current data readings. It will
be set to zero when the readings have all been updated. This may be used to initiate readings and poll for when
they are ready to be read. It may take up to 50 seconds to update all the readings, depending upon the flow con-
ditions. Setting the Take Reading flag to 2 causes an automatic, 15 second update of readings when a Modbus
master is polling the 2100.
(3) The Update Interval specifies an interval in seconds that the registers are automatically updated. It defaults to zero,
which indicates that no automatic updating will occur.
(4) The Active Flag (1-4) bit fields specify what fields/registers are active in the list. This provides support for a maxi-
mum of 64 fields. For example, if bit 0 of register 27 is set, the Level (registers 40,41) is active. If bit 1 of register
27 is set, then the Velocity (registers 55,56) is active. If bit 0 of register 28 is set, the Analog channel 7 (registers
265,266) is active.
(5)A non-zero status code indicates a measurement problem.
(6) Time is represented in a series of registers: Order is from lowest address to highest - Seconds (0-59), Minutes (0-59),
117
118-123
130,131
132
133-138
145,146
147
148-153
160,161
162
163-168
175,176
177
178-183
190,191
192
193-198
205,206
207
208-213
220,221
222
223-228
235,236
237
4-8
Name
Hours (0-23), Days (1-31), Month (1-12) and Year (1977-2099).
Volume 1 status code
Volume 1 time record
Voltage
Voltage status code
Voltage time record
Temperature
Temperature status code
Temperature time record
Internal Temp
Internal Temp status code
Internal Temp time record
Analog channel 1
Analog channel 1 status code
Analog channel 1 time record
Analog channel 2
Analog channel 2 status code
Analog channel 2 time Record
Analog channel 3
Analog channel 3 status code
Analog channel 3 time record
Analog channel 4
Analog channel 4 status code
Analog channel 4 time record
Analog channel 5
Analog channel 5 status code
Data Type
Units
16-bit integer
Time
4-byte float
Volts
16-bit integer
Time
4-byte float
Degrees Celsius
16-bit integer
Time
4-byte float
Degrees Celsius
16-bit integer
Time
4-byte float
0-100 percent
16-bit integer
Time
4-byte float
0-100 percent
16-bit integer
Time
4-byte float
0-100 percent
16-bit integer
Time
4-byte float
0-100 percent
16-bit integer
Time
4-byte float
0-100 percent
16-bit integer
Read/Write
Read
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