The Zebra Enterprise Solutions (ZES) WhereCall System allows users in manufacturing and
assembly operations to request service or specific parts without leaving their workstations.
Specific parts or service requests may be assigned to individual WhereCall IV devices so that
users may indicate which item is needed. For example, an assembly worker using several parts:
Each part is associated with a separate WhereCall IV device located in the workstation. By
pressing the green button on the WhereCall IV device, a radio signal is sent by the WhereCall
System to the computer system in the supply area, indicating which workstation requires the
specified part or service. The display will first blink CALL , and then alternate between CALL
and the time since the button press. This message can be customized to site preferences.
The WhereCall IV also operates in an optional SWITCH mode. This mode can be used to
indicate a status; the display will blink either -- ON -- or - OFF -- to indicate a functional status.
The status will toggle each time the button is pressed. These messages can also be customized
to site preferences. Each status can display a multi-word message on up to two different screen
buffers.
To insure that the WhereCall system is in constant operation, real-time monitoring using an “I’m
Still Alive” blinking transmission advises the system supervisor of the status of each WhereCall
IV device. Battery status is also included in these “I’m still alive” messages as well as in the
switch blinks, as well as in the button initiated blinks.
The WhereCall IV may be mounted in a work area with removable fasteners, double-sided foam
tape or with mounting brackets and screws (Refer to Section 2.1, Installation and Mounting).
3. Select two pairs (they are shipped in attached pairs)of Poly-Lock squares, remove the
adhesive backing on one side of each pair, and then press them to the tag case, sticky side
down as shown in Figure 3.
4. You should now have two pairs of Poly-Lock attached to the back of the WhereCall IV.
Remove the adhesive backing from both squares.
5. While holding the WhereCall IV, gently press the unit against the mounting surface to assure
that the adhesive on the squares is bonded to the surface.
3.3 WhereTag Foam Tape Squares
WhereTag foam tape, both sides adhesive, provides a secure, semi-permanent mounting method
for the WhereCall IV device. Foam tape is not included with the WhereCall IV. Contact your
ZES Account Manager for information, reference part number TM-202-00.
Figure 4: Foam tape squares
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The foam tape applies a layer of permanent adhesive film to both surfaces. Care should
be taken in the application of foam tape because once applied it is difficult to remove.
In CALL mode the WhereCall IV can be used for parts call and other operations that do not
require an indication as to whether the request was fulfilled. In this mode, the operator
presses the button to send the request message, and the WhereCall IV will transmit blinks
with “Switch ID 0” which has status 2. The display on the WhereCall IV will flash CALL
for one minute and then start to count up in minutes since the call was made. This lets the
operator easily verify how long it has been since they made their request. The display is
capable of counting up to 9 days, 23 hours, and 59 minutes shown as 9d23h59m after which it
will continue to alternate between CALL and 9d23h59m but the elapsed time will not
increment any further.
The displayed CALL can be replaced with any other 8-character custom message. The
custom message will blink for one minute after each button push, and then the custom
In switch mode, the display toggles between -- ON -- and -- OFF --. The normal starting state
is OFF. If the operator presses the button, then the WhereCall will send a message signaling
the change in state and the display will change to -- ON --. The resulting transmission blink
includes “Switch ID 0” which has status 2. The next button press will cause a new message
to be transmitted with “Switch ID 1” which has status 4. This signals the change of state and
the display will change back to - OFF --. In the SWITCH mode the WhereCall IV will send
multiple transmissions at increasing intervals after each button press. The first set of blinks
occurs as soon as the button is pressed, then repeats at 1 minute after the button press. The
message is then repeated at the following periods after the initial button press: 5 minutes, 10
minutes, 15 minutes, and then 30 minutes.. After completing that sequences, the WhereCall
IV then continue sending a set of blinks every 60 minutes.
The displayed -- ON -- and - OFF – messages can be replaced to show any one or a pair of 8-
character custom messages. If the message is replaced with a pair of custom messages, then
the display will not flash, but instead alternate between the pair of custom messages. When
the button is pressed, the display will alternate between the other pair of messages
The WhereCall IV can be switched to the Power OFF mode from either CALL mode or
SWITCH mode. In order to do this, press and hold the button until the display shows
******** and then release the button. The display will show the tag firmware version TAG
2109 for a few seconds and then show the PIC Microcontroller firmware PIC 1017 version
for a few seconds, the show PWR OFF . Note that the displayed version number may differ
than those shown above. The WhereCall IV is now OFF and all transmissions are disabled.
The magnetic receiver in the tag is also disabled.
4.4 Switching WhereTag IV Modes
To change modes between CALL mode and Switch mode or visa versa, press and hold the
button. After about 5 seconds, the display will show ********. DO NOT release the button
while the display shows ********, but continue to keep the button depressed until the display
shows:
CALL ? if the WhereCall IV is currently in SWITCH mode
-
- SWITCH ? if the WhereCall IV is currently is CALL mode.
When either of these is displayed, release the button , and then press and release the button
again within five seconds. This will change the operational mode.
If the WhereCall IV has been changed from CALL mode to SWITCH mode, the tag will send
SW ID 1 with status 4 and the display will show - OFF --.
If the WhereCall IV has been changed from SWITCH mode to CALL mode, the tag will send
SW ID 0 with status 2 and the display will show CALL .
To change the WhereCall IV mode between ISO 24730, CCX, and dual mode, the WhereCall IV
must be in OFF mode and display PWR OFF . Press and hold the button for several seconds
until the display starts to cycle between these options…ISO MODE, CCX MODE, DUALMODE,
and CNG BATT.
To switch to ISO 24730 mode, keep the button pressed until the display is showing ISO MODE,
then release the button, then click the button again to activate the mode. This mode will disable
all CCX blinks and the WhereCall IV will only send ISO 24730 blinks. In ISO 24730 mode, the
decimal point in the lower right most corner of the LCD will flash.
To switch to CCX mode, keep the button pressed until the display is showing CCX MODE, then
release the button, then click the button again to activate the mode. This mode will disable all
ISO 24730 blinks and the WhereCall IV will only send CCX blinks. In CCX mode, the
apostrophe in the upper left most corner of the LCD will flash.
To switch to dual protocol mode, keep the button pressed until the display is showing
DUALMODE, then release the button, then click the button again to activate the mode. In this
mode, the WhereCall IV send both ISO 24730 and CCX blinks. In dual protocol mode, both
the decimal in the lower right most corner and the apostrophe in the upper left most corner of
the LCD will flash.
If the user has inadvertently released the button at the wrong time and the WhereCall IV is
displaying the wrong mode, do not click the button again. The tag will timeout and return to
OFF mode and the display will show PWR OFF . The user can now start the changing protocol
The WhereCall IV supports soft messaging which allows the user to replace the displayed
messages CALL , --—ON -- and/or -—OFF -- with custom messages. Setting or changing the
soft message will require a WhereWand to enter and program the messages to the WhereCall IV
magnetically.
If a custom message is configured in CALL mode, then the custom message will be displayed. ,
instead of CALL blinking or alternating with elapsed time, There is no change to the air
protocol blink content .
In SWITCH mode, each of the two messages can be replaced with a single message or a pair of
messages.
If custom messages are configured and the WhereCall IV is in the SWITCH mode ON state,
instead of --—ON -- blinking, the display will either blink the custom ON mode single message
or alternate between the pair of custom ON mode messages.
If custom messages are configured and the WhereCall IV is in the SWITCH mode OFF state,
instead of -—OFF -- blinking, the display will blink either the custom OFF mode single message
or alternate between the pair of custom OFF mode messages.
ZES does not provide the required materials and tools for changing batteries with the WhereCall
IV Tags. The following tools will be required to change the WhereCall IV batteries.
• One, torque wrench with a 5/64 inch hex drive bit and the torque set to 6.0 + .6 inch-
pounds [0.68 +
0.07 Newton-meters] for the six screws on the bottom cover of the tag.
• One, “small, pocket size” flat blade screw driver use to remove batteries from the battery
holder.
• One, ESD wrist strap or equivalent static protection device.
4.7.4 Procedure
To change the WhereCall IV batteries, the WhereCall IV must be in OFF mode and display
PWR OFF . See section 4.3 for instructions on turning the WhereCall IV off.
Step 1: Enter battery change mode as follows
Press and hold the button for several seconds until the display starts to cycle between
these options…ISO MODE, CCX MODE, DUALMODE, and CNG BATT. Release the
button when the display shows CNG BATT, then click the button again to activate the
mode. The WhereCall IV is now in a mode that draws more current in bursts to ensure
the circuitry fully discharges when the batteries are removed. This mode will expire in 5
minutes, so the batteries should be replaced within 5 minutes to ensure proper restart of
the internal processors.
Step 2: Remove the 6 screws from the bottom cover of the WhereCall IV and remove the
button and then press the button
Indicates that the user has held
the button for several seconds
and can now change mode
from SWITCH mode to CALL
mode if desired.
again within 5 seconds. Pressing
the button again will initiate
CALL mode and issue Call
blinks. Releasing the button
without pressing it again will
Release the button,
then press the
button again to
initiate “CALL”
operation.
cause the WhereCall IV to enter
OFF mode.
To change modes release the
button and then press the button
Indicates that the user has held
the button for several seconds
and can now change mode
from CALL mode to SWITCH
mode if desired.
again within 5 seconds. Pressing
the button again will initiate
SWITCH mode and issue Switch
ID 0 blinks. Releasing the button
without pressing it again will
Release the button,
then press the
button again to
initiate “SWITCH”
operation.
cause the WhereCall IV to enter
OFF mode.
ISO MODE indicates the user
has pressed and held the
button for several seconds
while in PWR OFF state and
can now put the tag into ISO
24730 transmit mode
CCX MODE indicates the user
has pressed and held the
button for several seconds
while in PWR OFF state and
can now put the tag into an
unsupported mode
The display will cycle between
the various protocol modes and
the change battery mode. The
user must release the button
when the 24730 mode is shown
then click the button again to
activate the mode.
The display will cycle between
the various protocol modes and
the change battery mode. The
user must release the button
when the desire mode is shown
then click the button again to
activate the mode.
has pressed and held the
button for several seconds
while in PWR OFF state and
can now put the tag into an
unsupported mode
CNG BATT indicates the user
has pressed and held the
button for several seconds
while in PWR OFF state and
can now put the tag into
battery change mode
The display will cycle between
the various protocol modes and
the change battery mode. The
user must release the button
when the desire mode is shown
then click the button again to
activate the mode.
The display will cycle between
the various protocol modes and
the change battery mode. The
user must release the button
when CNG BATT is shown then
click the button again to activate
the mode.
Release the button,
then wait until the
WhereCall IV
returns to POWER
OFF mode.
Release the button,
then press the
button again to put
the WhereCall IV
into battery change
mode.
The user should remove the
Indicates that the WhereCall
IV is in battery change mode.
bottom cover and replace the
batteries within 5 minutes of
starting the mode. To exit the
Replace batteries or
click the button to
exit the mode.
mode, click the button again.
Indicates that the WhereCall
IV has detected a low battery.
The user should enter battery
change mode and change the
batteries.
This message will alternate or
cycle with the existing messages
in either CALL or SWITCH
mode.
This device must operate in compliance with Federal Communications Commission (FCC)
Rules and Regulations Parts 15. See FCC registration label, located on the bottom of the
equipment, for the FCC registration.
This equipment has been tested and found to comply with the limits for both Class A and Class
B devices, pursuant to Part 15 of the FCC Rules.
This device complies with FCC ID: Approval TBD
This ISM device complies with Canadian ICES-001
Cet appareil ISM est conforme à la norme pendant du Canada.
Radio Type Approval No………Approval TBD
RF Notice
Any changes or modifications to ZES equipment not expressly approved by ZES could void the
WhereTag IV PLC Interface Cable Electrical Block Diagram
The momentary switch will initiate blinks
when it is closed for 100 milliseconds and
then released. The switch must not
remain closed for more than 3.0 seconds
to avoid switching to power off mode.
____________
Turck RS 4.41T-X
(Connect to WhereCall IV PLC)
The cable should be connected and routed to prevent large voltage spikes and static
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CAUTION
discharges from being carried into the tag via the switch cable. This may result in false
“Button Calls” being generated or in extreme cases the TFF-2221 could be damaged.