Emot200 Board; Number Of Controls By Emot200 Board - Hitachi 902 Service Manual

10.4

EMOT200 Board

(1) Explanation of Circuit Board
The EMOT200 board is a mechanism control board mounting one GMCONT and eight
GPCONTs which are one-chip motor controllers (hereafter referred to as MCU) and
conforming to the VME bus standard. By mounting the MCU to the specified position on
the EMOT200 board, the MODE pin of MCU is set for function selection. Each GPCONT
controls two stepping motors.
The circuit board is provided with the watchdog timer function and when the CPU is
abnormal, all controllers are reset to prevent the mechanism from running out of control.
(2) Number of Controls
Each GPCONT can control two two-phase stepping motors and accept four interrupt
inputs (limiter inputs) for each motor. Eight MCUs (for 16 motors) are assigned to the
EMOT200 board as exclusive controllers for two-phase stepping motors.
One GMCONT is equal to two conventional MTCONTs. Namely, each GMCONT can
control sixteen D/I's and D/O's. And eight D/O's for which the timer is unprogrammable
are available.
One GMCONT is assigned to the EMOT200 board.
The following table shows the number of controls by the EMOT200 board.

Number of Controls by EMOT200 Board

GPCONT
GMCONT
Other
*1 Phase output and power save signal
*2 Switch for software setting
Designation
2-phase stepping motor output *1
Limiter input
D/O (timer programmable)
D/I
D/O
D/O
CPUDI × 8
DI for DIP SW × 2 *2
Q'ty
16
16 × 4
16
16
8
8 bits
8 × 8 bits
16 bits
10 - 14