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PU-2A USERS
MANUAL EM-9255-C Rev.14
B-1. INTRODUCTION
The fundamental procedures required for configuring input data of the M-System JX series field programmable pulse
transmitters are explained in this section. In order to do this, the Model PU-2A programming unit is required.
Each function is easily programmable via the PU-2A keyboard by selecting a specific number ([DATA] entry for each
[ITEM]) from the table of the specific unit function. The operator need only understand the meaning of each [ITEM]
in order to program the unit. No special programming skills or software is required.
There is specific terminology associated with the PU-2A programming unit. The table categories are called [GROUP],
which define whether the data is common for many types of transmitters or inherent for each transmitter model. Each
group has several [ITEM] numbers, each of which show what is to be programmed or monitored. [DATA] is the specific
input value or percentage to be adjusted. The PU-2A programming unit’s operations are based on these three levels:
[GROUP] – [ITEM] – [DATA].
B-2. GENERAL OPERATION DESCRIPTION
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DESCRIPTION
• When You Want to Monitor the Transmitter Status in Operation:
1) Connect the PU-2A to the transmitter via the front modular jack.
2) Specify an item to be monitored.
Press [GROUP] NN [ITEM] NN. (N = number entry keys)
3) Specify another item if necessary. Repeat (2).
4) Disconnect the PU-2A.
• When You Want to Change Parameters:
1) Connect the PU-2A to the transmitter via the front modular jack.
2) Switch the transmitter into PROGRAM mode with PU-2A.
3) Specify an item to be changed.
Press [GROUP] NN [ITEM] NN [DATA] N (NNN....) [ENTER] (N = number entry keys)
4) Specify another item if necessary. Repeat (3).
5)
Switch the transmitter into MONITOR mode with PU-2A.
The changed parameters are saved in the nonvolatile memory.
6) Disconnect the PU-2A.
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MAINTENANCE SWITCH & OPERATION MODES
There are two operation modes for JX pulse transmitters: MONITOR mode and PROGRAM mode. You use the Main
-
tenance Switch, lock command to prevent unauthorized access to specific data, for changing the operation mode.
In MONITOR mode, the transmitter is in normal operation, measuring, computing and outputting signals. You can
only monitor parameter settings, measuring result, output status but cannot affect the transmitter’s operation. No
parameter change except for the Maintenance Switch is available.
In PROGRAM mode, the transmitter stops measuring and renewing the output signal. The output signal is held, but
you can output a specific value for simulation and testing purposes. You can also control manually the transmitter to
measure input frequency signals. Parameter settings can be changed.
For changing to the PROGRAM mode, key in [ITEM] 01 [DATA] 1 [ENTER]. The display will appear as follows:
G0
P
1
G
I
M
0
(
1
stop)
( )
m
#
o
0
de
Then after a delay for a few seconds, the transmitter is switched to the PROGRAM mode.
When all the program changes are completed, be sure to return the transmitter to the MONITOR mode. The modifi
-
cation will be lost if you turn off power supply to the transmitter without doing it. When the power is turned on, the
transmitter starts up in MONITOR mode.
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OUTPUT SIMULATION PROGRAMMING
The output signal of the transmitter is held while in the PROGRAM mode, but you can output a specific value for
simulation and testing purposes. Press [GROUP] 01 [ITEM] 03 [DATA] (desired output value) [ENTER]. The output
value changes in accordance with further adjustments with other [ITEM]s.