Technical Manual

WH Münzprüfer Dietmar Trenner GmbH, Germany Technical Manual EMP 500 v7 /CLB
version 2.7
EMP 500 v7 /CLB subject to technical modification page 43/62
answers from the coin selector to a poll command must be acknowledged
through the VMC within 5 milliseconds with ACK (00h). Older
specifications of the MDB protocol defined 5 ms, nowadays it is 20 ms.
With the EMP 500 v7 /CLB this timing can be programmed. As a standard
for the EMP 500 v7 /CLB 8 ms are set. If no acknowledgement has been
received within 8 milliseconds the coin selector handles this as a NACK
and transmits the same answer on the next poll command again.
4.3.3. Basic Commands
Command Code Data
RESET 78h -
The acceptance of coins is blocked. The response to the next poll is 07h
(Reset).
Command Code Data from the EMP
STATUS 79h 30 byte Z1 to Z30
Z1 [reserved]
Z2 - Z3 country code
Z4 scaling factor
Z5 decimal place
Z6 number of sorting shafts (upper nibble)
shaft of main cash box (lower nibble)
Z7 - Z14 channel – shaft assignment
in one nibble the number of a coin channel
beginning with the shaft number of type 0; in the
upper nibble beginning with Z7
Z15 - Z30 values of coins, beginning with type 0 in Z15
Command Code Modifier Data from EMP
Master – Slave assignment 7Fh 23h 8 Bytes Z1 to Z8
Z1 – Z8 Master – Slave assignment, coded in one nibble.
Beginning with the master for channel 17 (slave 1) in
the upper nibble of Z1 to the master for channel 32
(slave 16) in the bottom nibble of Z8.
Command Code Data from EMP
POLL 7Bh 1 byte
When a response is given it is important whether the coin selector is
operating in ordinary or in extended MDB protocol.
• ordinary multi drop bus protocol
00h no result (ACK)
07h reset
8nh type n
1)
90h coin return button pressed
91h subsequent coin in measuring system
92h coin jam 1
93h coin does not match parameter set
94h multi drop blocking
95h coin jam 2