Milnor MP1540 Series, Руководство пользователя

Страница: 16 / 107

Milnor
® Allied
Interface Specifications and Signals, Single Stage Press
PELLERIN MILNOR CORPORATION
1.2.
Component Requirements for Milnor Inputs
—For signals from allied to Milnor
(allied outputs/Milnor inputs–which connect directly to control boards and are used to ground
Milnor control inputs), Milnor applies a low energy signal as follows:
• Voltage: 5VDC or 12VDC
• Minimum current: 5 milliamps
The potential-free contacts supplied by allied and the circuit wiring must be capable of faithfully
carrying these low energy signals.
CAUTION 3 : Risk of Bad Data
—Resistance due to wire length or deteriorated contacts can
mask signals. Inadequate shielding against electrical noise can trigger false signals.
• Keep wire runs as short as possible.
• Use a digital signal ground connection (wire number 2G on the CBW; wire number 7 on
other Milnor devices), not merely chassis ground.
• Ground any spare wires.
• Pass all wires through a ferrite bead.
• Replace relays that have worn or corroded contacts.
• Do not run input wiring adjacent to, or in the same conduit with, any wires carrying AC.
For example, do not run input and output wiring in the same conduit if AC is used to
power Milnor output/allied input signals.
1.3.
Functional Requirements
1. For numeric signals (batch codes) from allied to Milnor (allied loading interface), all signals
must be properly set when the operational signal indicating this data is valid occurs. Signals
must remain set for the longer of 5 seconds or through any subsequent operational signal
requiring this data (see “Loading Interface non-Numeric Signals...”). Milnor will read all
numeric signals during this time.
2. For numeric signals from Milnor to allied (allied discharge interface), allied must not read
signals until the
data valid
, or other operational signal indicating data is valid occurs (see
“Discharge Interface non-Numeric Signals...”).
3. Although not all the operational signals listed in the tables are necessarily required, (the
signals used will vary with specific machine models and with variations in the operating
cycle), those signals used, must occur in the order listed.
4. When connecting numeric signals between devices, ensure that signals are properly matched
up with respect to significance (least significant-to-least significant, next least significant-to-
next least significant, etc.).
2.
How the Signals Tables Are Organized
For an allied device that loads the Milnor machine, Milnor provides an allied loading interface .
For an allied device that receives goods from (discharges) the Milnor machine, Milnor provides
an allied discharge interface . In both cases, some signals are used in groups to pass numeric
values in binary and some signals are used individually to pass non-numeric (on/off) values. The
receiving device can read the groups of numeric signals in any order as long as it reads this data
during the window of time within which it is valid. However, because each signal within a group
of numeric signals represents a specific digit of the binary number, the order of significance of
the signals ( digit order ) must be understood and must match on sending and receiving devices.
Most non-numeric signals provide operational information which must be exchanged according
to a predetermined “handshaking” scheme. Hence, the sequence in which operational signals
occur ( enabling order ) is critical. Accordingly, the signal information is presented in four tables:
12