Changer Operation
Table 6:
TRC6800 Power Plug Pins
PIN #
Description
1
117/24 VAC (Hot)
2
117/24 VAC (Neutral)
3
Vend Relay - Normally Open - Price #1 (Hot)
4
N/C
5
Exact Change - Normally Open (Neutral)
6
Blocker (Hot)
7
Vend Relay - Normally Closed (Hot)
8
Escrow to Select Option - not used in the
ETV condition
Figure 7:
TRC6800 Power Plug
Micromech Interface
The Micromech interface transmits data to the external
VMC via its INTERRUPT and DATA lines. The controller
responds to these messages via its SEND line. These
three lines form the serial data link between changer
and controller. The VMC supplies power to operate the
changer via its four power lines. In addition, the VMC
has five control lines that authorize coin payout,
enable/inhibit coin acceptance, and reset the changer to
its standby condition.
Refer to Figure 8 for power plug
pinout.
Micromech Electronics Operation Sequence
When a coin enters the mechanism, an "interrupt"
signal is sent on Pin #4 to inform the VMC that the
mechanism is ready to send credit information.
When the VMC receives this "interrupt" signal, it
signals the mechanism via a "send" signal on Pin #3.
This indicates to the mechanism that the VMC is
ready to accept "data".
When the mechanism receives this "send" signal, it
transmits a message on Pin #5 containing the
following data:
coin value - 5¢, 10¢, 25¢ or $1.00.
coin tube status - coin tube sensors are covered/not
covered.
coin direction - to coin tube or to cash box.
If a coin is rejected, or if there is a problem in the
mechanism, certain default messages are sent to the
VMC on the "data" line. They are as follows:
slug - coin entered but was not accepted (accept gate
did not open).
no strobe - coin was accepted but did not actuate
strobe (could indicate jam or strobe issue) dollar
coins rejected due to insufficient quarters in the coin
tube or sensor in the coin tube.
power up - indicates coin changer was just reset or
powered up.
8
